DIAMOND FACTS

Addressing Myths & Misconceptions About the Diamond Industry

Foreword

Natural Diamonds Have An
Extraordinary Story to Tell.

Natural diamonds are the Earth’s real treasures, exceptionally rare, and are mined today in a responsible way that supports livelihoods and contributes to conservation efforts around the world.

This new edition of Diamond Facts sets out to address the most common myths about the diamond industry, from those produced synthetically to natural stones unearthed from deep underground.

The first issue of Diamond Facts was well received by journalists, retailers, consumers and business leaders in our industry. As a single point of reference for data, it gave the natural diamond industry an accurate and consistent voice for the first time. This unified voice has had a positive impact on press stories and other influential conversations around the world. Narratives are more factual and balanced than those seen in previous years.

Natural diamonds are part of a dynamic industry, and the market is always subject to change. The information we share must reflect these changes too. This new edition of Diamond Facts, part of our Diamond Reports series, contains updated data on myths included in the first edition and new myths addressed with previously unreported data. We hope that you find this update helpful, and we welcome feedback on other topics and data points that would be of benefit in future versions of Diamond Facts.

We also encourage you to explore our other reports in this series, including Diamonds of Canada.

We will regularly be issuing reports in partnership with leading experts, data organisations and diamond industry representatives*.

DAVID KELLIE – CEO, NATURAL DIAMOND COUNCIL

Introduction

In this updated analysis we continue to address misinformation about both natural diamonds and laboratory-grown diamonds.

Our focus is on providing clear, accurate and reliable information so consumers can make informed choices. As detailed in the research, the reader can use existing information to formulate their own opinions.

Misinformation is harmful for all stakeholders in the diamond value chain, whether that is the consumer, mining companies, investors or local communities involved in regions that rely on the production of diamonds for economic stability.

We are dedicated to creating a positive legacy for all these stakeholders through openness and unbiased research.

Our work details an investigation into questions often posed relating to environmental and social standards, alongside general misconceptions about the market, such as quantity of diamonds recovered.

We redress the claims that it is impossible to distinguish between a laboratory-grown diamond and a natural diamond, explore how consumers can navigate this when buying diamonds and detail the global regulations in place to protect purchasing decisions along the supply chain.

On the environment, we delve into the nuances of sustainability claims made by the laboratory-grown diamond industry. Alongside reviewing impacts on water, waste and chemicals, we also look at the emissions footprint of both natural and synthetic diamonds, and the process of responsible opening and closure of mines. We also include further examples on the impact of the natural diamond industry from manufacturers’ perspective.

Outdated and misleading narratives about social conditions in the natural diamond industry are also evaluated. We explore the ethical sourcing of natural diamonds, the heightened focus on transparency, and the adoption of technology to enhance traceability. The robust set of measures in place to enshrine the rights of the employees of Natural Diamond Council (NDC) members is included. Through spotlighting initiatives and social programs, we seek to communicate the positive impact the natural diamond industry has on the livelihoods of 10 million people, especially from diamond-producing countries.

By tackling outdated and factually incorrect narratives, we are able to collaborate with all stakeholders to better communicate the inherent value and benefit of natural diamonds, as well as ensure clear and accurate information is shared about the industry in order to build trust and cultivate transparency. This is married to our mission at the Natural Diamond Council.

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A NOTE ON RESEARCH METHODOLOGY

The findings of this analysis have been derived from a thorough review of a wide range of secondary research sources and the evaluation of internal research conducted on behalf of the Natural Diamond Council by globally respected third-party organizations.

Industry experts and independent sustainability advisors were consulted on the topics included in the work to inform the findings. Research was conducted at the beginning of 2023 and the data and results have been updated in 2024. Methodologies for calculations pertaining to environmental footprints have been detailed in the footnotes and where industry data gaps or inconsistencies exist, a range has been used to provide balance. We welcome increased levels of disclosure across the industry for both natural and synthetic diamonds to enrich and inform future research.

Key Findings

Is it possible to tell a laboratory-grown
diamond from a natural diamond?

FACTCHECK:

All laboratory-grown diamonds can be detected using professional verification instruments. These tools use a variety of technologies to detect the differences between natural diamonds that are formed over billions of years in the Earth, and synthetic diamonds that are produced over a number of weeks in a manufacturing environment.

Claims that it is impossible to distinguish between a synthetic, laboratory-grown diamond and a natural diamond are false. Since diamond crystals grow differently in nature from in a laboratory, their grain patterns, like those in wood, are different¹.

Consumers want to be sure about what they are buying, and there are many instruments available to distinguish between natural and synthetic diamonds. There are also legal definitions, advertising guidelines and certifications to ensure that consumers are correctly informed. These are explored in the following chapter.

Industry professionals have, for many years, used specialist laboratory equipment to examine growth patterns, composition, nitrogen content, fluorescence and spectral signature to identify whether a diamond grew in the Earth’s mantle or if it was manufactured in a factory.

For example, production of colorless laboratory- grown diamonds requires almost the complete removal of nitrogen, a constituent of around 99% of natural diamonds². The changes to impurities in natural diamonds produced by extended time under the Earth’s crust can lead to very different responses to ultraviolet light.

These studies have been applied to the development of screening and detection instruments that can be used to reliably detect all laboratory-grown diamonds³.

With the increased quantity of laboratory-grown diamonds on the market, it has become increasingly important to address the misconception that natural and laboratory-grown diamonds are indistinguishable. Doing so can help protect consumers, and ensure they understand the product they are buying, that is accompanied by the correct claims about its origin.

CVD LABORATORY-GROWN DIAMONDS

Differences which exist between natural and laboratory-grown diamonds are due to their differing creation processes. Natural diamonds were formed between 90 million and 3 billion years ago⁴ through the effect of high pressures and temperatures on carbon found approximately 100 miles below the Earth’s surface. They were subsequently brought to the surface by dramatic volcanic eruptions. Laboratory-grown diamonds are mostly produced in a number of weeks using one of two technologies.

The High Pressure High Temperature (HPHT) method emulates the Earth’s method of diamond creation by using very high temperatures (1,300- 1,600°C) and high pressures. Alternatively, the Chemical Vapor Deposition (CVD) method produces a diamond crystal from a seed diamond plate by placing it in a hot gas chamber (900-1,200°C) with methane and hydrogen. The table below provides more detail about the differences in the creation processes and resultant rough and raw
diamond shapes.

What tools are used to detect synthetic and natural diamonds?

The structural differences between laboratory-grown and natural diamonds may not always be visible to the naked eye. However, there are more than 20 instruments available on the market which can help those involved in the diamond supply chain – like retailers, designers, and manufacturers – detect the difference.

According to the GIA, the instruments help professionals read a diamond’s spectral signature to determine its composition and identify whether it originated in nature or from a laboratory. Researchers are trained to check for graining patterns and ultraviolet fluorescence reactions, specific to laboratory-grown diamonds. But in recent years, changes in the quality and growth of CVD synthetic diamonds has led to greater dependence on spectroscopic identification techniques alongside the more traditional approaches¹⁶.

Further industry assurance

Diamond Verification Instruments are an integral part of the procedures that ensure pipeline integrity, preventing the mixing of synthetic diamonds and natural diamonds.

The NDC established the ASSURE program in 2019. It assesses the relative performance of Diamond Verification Instruments available on the market. Industry professionals can use the directory to guide them in choosing the instrument that will best serve their needs¹⁷.

Certification and legal guidelines on diamond definitions also help guide customers and stakeholders across the supply chain on whether they are buying laboratory-grown or natural diamonds. Read on to find out more.

How do I know whether I’m purchasing a
natural or a laboratory-grown diamond?

FACTCHECK:

Legal definitions and advertising guidelines exist to protect consumers and ensure they understand whether they are purchasing a natural or laboratory-grown diamond. Retailers obtain specific grading reports or certifications from independent organizations that can verify the origins and quality of natural and synthetic diamonds.

Legal Definitions and Advertising Guidelines

Clear diamond terminology exists to guide audiences on what can and cannot be classified as a diamond, as well as how to refer to laboratory- grown diamonds¹⁸.

Across the world, there are now global standards and national legislative requirements which must be followed by anyone selling these stones.

Key points from the standards are:

The word ‘diamond’ used on its own always implies a natural diamond.
Just three terms can be used to describe synthetic diamonds: ‘synthetic diamonds’, ‘laboratory-grown diamonds’ and ‘laboratory-created diamonds’. Terms that include the manufacturer’s name, followed by the word ‘created’ are also permitted in the United States of America.

Table 2 – Summary of Definitions and Guidelines

Understanding grading reports and certifications

Consumers can also be assured about the identity of their diamond by asking for grading reports or certifications²³ (depending on the grading laboratory).

Laboratory-grown diamonds reports must always disclose in a clear way that they are laboratory- grown. For example, the GIA laboratory-grown diamond report²⁴ provides information as to whether a diamond was made via CVD or HPHT.

Figure 1 – Sample of GIA Natural Diamond report²⁵

Figure 2 – Sample of a GIA laboratory-grown diamond report²⁶

Understanding environmental terms

Before diving into the questions about sustainability and environmental impact, take a look at these concepts.

CARBON FOOTPRINT: EXPLAINED

The quantity of greenhouse gas emissions (GHG) expressed in terms of carbon dioxide equivalent (CO2e), emitted into the atmosphere by an individual, organization, process, product or event from within a specified boundary. The word ‘equivalent’ is used in the metric because other GHGs besides carbon dioxide, such as methane, are also released into the atmosphere. These are included in the measurement to create one standard figure for comparison and tracking over time.

CARBON INTENSITY: EXPLAINED

A measure of the carbon footprint (in terms of carbon dioxide and other GHG emissions) per unit of activity. For diamonds, carbon intensity is typically calculated by totaling the GHG emissions over a period from a laboratory or mine and dividing this by a measure of production in that period. This is usually either rough or polished carats.

OVERVIEW OF SCOPES AND EMISSIONS ACROSS THE VALUE CHAIN

The emissions accrued can be separated into three overarching types; Scope 1, Scope 2 and Scope 3 emissions²⁷ ²⁸.

Figure 3 – Overview of scopes and emissions across the value chain

Scope 1

Scope 1 covers direct emissions that occur from sources that are controlled or owned by an organization (e.g., emissions associated with vehicles)

Scope 2

Scope 2 covers indirect emissions from the purchase and use of electricity, heating, cooling and steam. In using these sources the organization is indirectly responsible for these emissions.

Scope 3

Scope 3 covers all other indirect emissions that are not produced by the company itself but are a result of activities of various stakeholders up and downstream of the organization.

Are all laboratory-grown
diamonds sustainable?

FACTCHECK:

Laboratory-grown diamonds may not always be as sustainable as some claim. The manufacturing process, which lasts a few weeks, is energy- intensive, requiring temperatures similar to 20% of that of the Sun’s surface²⁹. Over 70% of laboratory- grown diamonds are mass-produced in China and India where 62% and 74% of grid electricity is generated from coal³⁰.

Publicly available research reveals that the claim that laboratory-grown diamonds always have a low, neutral or even negative carbon footprint is not true. The environmental sustainability of laboratory-grown diamonds depends on the energy, chemical, material, water, and waste management of the factory in which they are produced. It is also not possible to make a simplistic general comparison between natural diamonds and laboratory-grown diamonds. Each category has a range of production processes, geographical locations, power sources, productivity capabilities, and sustainability practices.

It is also a misconception that laboratory-grown diamonds are mining-free, as stated in some marketing campaigns. Synthetic diamond processes can require graphite and metals, and the reactors in which laboratory-grown diamonds are created are built with metals that all originate from mining.

Sustainability claims about laboratory-grown diamonds should be supported by evidence on their social footprint too, especially in areas relating to tax payments, employment and human rights, as well as the support provided for local communities in laboratory-grown diamond regions.

This chapter focuses largely on environmental sustainability and seeks to address these misconceptions with publicly available data.

Background on scale and emissions footprint
of laboratory-grown diamonds

The energy required to grow laboratory-grown diamonds depends on many factors including the size of the diamond and the type and age of the machinery used. For example, large stones require more energy to be manufactured. The most significant factor that impacts energy usage is the method used (HPHT or CVD) in their manufacturing. The emissions generated by laboratory-grown diamond manufactures depend on the amount of energy required and the energy source used. If electricity is sourced from the national grid, it will depend on the geographical location too and the extent to which the grid has been decarbonized with the use of renewable energy. Verified renewable energy certificates or similar (RECs) for the allocated usage is one way to confirm the energy is green and traceable/ independently verified.

Analyst Paul Zimnisky estimates that in 2024, approximately the majority of laboratory-grown diamonds were produced in China (46%) and India (26%)²⁹, both of which have a heavy dependence on coal for electricity production. The $22 billion global laboratory-grown diamond industry is growing quickly³⁰. Currently, according to Edahn Golan Diamond Research & Data, the market reached 15-20 million carats, whilst the industry’s capacity stood at around 6-7 million carats in 2020³¹, indicating that production capacity is increasing.

The energy consumption of laboratory-grown diamonds

The energy mix where laboratory-grown diamonds are produced is important when considering how sustainable they are because the production of laboratory-grown diamonds is highly energy-intensive. As previously stated, there are two main methods of producing laboratory-grown diamonds: High Pressure High Temperature (HPHT) and Chemical Vapor Deposition (CVD). The latter is significantly more energy intensive, mainly due to the use of high energy microwaves to produce the growth plasma.

In these processes, energy is required for extreme heating, up to around 1,500 degrees°C³⁹ and for HPHT, pressure generation. A considerable amount of water is also required in some factories for cooling systems for reactors. Energy is also needed to stabilize the environment within the factory to ensure external conditions do not impact the growth of the synthetic diamond.

If electricity used in the production phases of laboratory-grown diamonds originates from non-renewable sources, this can contribute to laboratory-grown diamonds’ GHG emissions.

So, what is the exact carbon footprint of a laboratory-grown diamond? Few laboratory-grown diamond companies transparently disclose or verify such data and the truth is, there is no single agreed-upon figure. It is dependent on multiple factors including the method of production, the region and the methodology used to calculate the footprint. Sphera have estimated that the average emissions per polished carat produced by the CVD process can vary from 260kg C02e to 612kg CO2e in India⁴⁰. In the instance that 100% renewable energy is used, then their research estimates this figure can be as low as 17kg CO2eq per polished carat of laboratory-grown diamond⁴¹.

CHEMICAL VAPOR DEPOSITION: EXPLAINED

The CVD diamond growth process involves placing seed crystals in a chamber that is filled with gas and heated to temperatures of 900- 1,200°C. Microwaves heat the gas into a plasma from which carbon atoms are deposited onto a seed crystal to form a diamond. The entire process usually takes three weeks to a month before the diamonds are ready to be cut and polished³⁶.

CARBON INTENSITY: EXPLAINED

HPHT involves placing a diamond seed into a capsule which is placed into a press. The capsule is heated to temperatures of 1,300- 1,500 °C with pressures above 870,000 pounds per square inch. According to the GIA, this pressure is roughly equivalent to the pressure exerted by a commercial jet airplane if balanced on the tip of a person’s finger³⁷. Metal in the growth capsule melts and dissolves the high-purity carbon source and carbon atoms are then deposited on the seed crystal to generate diamond growth³⁸. Following conversations with industry professionals, we learnt that each HPHT reactor can weigh around 50 tonnes.

The carbon footprint of a 1 carat cut and polished laboratory-grown diamond

Figure 3 – The carbon footprint of a one carat cut and polished laboratory-grown diamond. Source: Sphera⁴²

Within the laboratory-grown diamond market, different producers use different reactors in their production processes, which have varying energy efficiencies. This further impacts the accuracy of generalized figures that are often used. Just as some natural diamond companies use renewable energy, there are instances where laboratory-grown diamonds use renewable sources for their processes. Hydropower is a reliable renewable source and it can provide a constant source of high-intensity energy that is required for the growing process of a synthetic diamond. In these instances, it is fair to say that these laboratory-grown diamonds are more environmentally sustainable than orthodox mass-produced laboratory-grown diamonds where factories and machinery rely heavily on fossil fuels and non-renewable sources.

To navigate these complexities and if it is of interest, buyers should ask for carbon footprint data from the specific laboratory-grown diamond factory that produced their diamonds. There is limited data and transparency about carbon emissions from laboratory-grown diamonds.

Also, claims that laboratory-grown diamonds always have a lower carbon footprint and are therefore always more sustainable than natural diamonds are not true. The answer is dependent on numerous variables, especially in the natural diamond recovery process. These include geography, the mining process⁴⁴ and the use of renewable energy.

There is a common misconception that laboratory- grown diamonds are always mining-free. This is not entirely true. Laboratory-grown diamond synthesis requires the production of machines to carry out various processes. Machinery and machine processes involved at laboratory-grown diamond factories, like the presses, are made of high-grade steel, a material that has a high level of embodied carbon⁴⁵. Additionally, manufacturing HPHT synthetic diamonds requires graphite, metals like nickel, iron and cobalt and pyrophylite – albeit in small quantities⁴⁶. Equally, synthetic diamonds produced via CVD require methane and hydrogen. Methane is generally sourced from the mining of fossil fuels like gas, oil and coal⁴⁷.

While hydrogen may be an emission-free fuel at the point of use, the energy density and energy losses involved in making it can pose a challenge. Unless the hydrogen is certified as green, it will not be emissions-free. Hydrogen has a lower energy density by volume compared to conventional fuels, requiring compression or liquefaction for storage and transport, both of which are energy-intensive processes that can reduce the overall efficiency of hydrogen as a fuel source, which could be as low as 25%⁴³. The same principle applies to methane, unless the source is renewable feedstock

The detailed process of raw material extraction for laboratory-grown diamonds can be found in the Annex, at page 58.

On water usage, some HPHT factories require the use of large volumes of water to cool their equipment.

In China, where the majority of HPHT production takes place, factories use common water reservoirs to cool the HPHT presses and this reservoir water can be used multiple times. Research has found that in general, water consumption for the HPHT and CVD methods is materially insignificant, approximately 0 and 0.002 m3 per carat, respectively⁴⁴. When it comes to exact figures on water recycling, there is little publicly available data on this to review.

A NOTE ON GREENWASHING

The global crackdown on greenwashing, specifically on misleading environmental claims, has affected the sustainability statements made by certain producers of laboratory-grown diamonds.

The Federal Trade Commission in the US sent warning letters to companies in 2019⁴⁵ regarding their diamond advertisement disclosures. It noted that any campaigns that claimed products were ‘eco-friendly’, ‘eco-conscious’, or ‘sustainable’ without specific evidence or data to back this up would be placed under review⁴⁶.

It also started a public consultation process with the purpose to review its Green Guides. The UK’s Competition and Markets Authority (CMA) published its Green Claims Code⁴⁷ and France has brought in fines against companies found to be greenwashing⁴⁸.

The European Union has also announced a set of new legislations aimed at tackling eco-claims. This underscores the importance of ensuring that any sustainability claims made by producers of laboratory-grown diamonds can be sustained and are underpinned by robust evidence.

What about laboratory-grown diamonds’ social sustainability performance?

Any broad claims that laboratory-grown diamonds are always a sustainable option must consider the social implications of the industry across the entire supply chain too.

Whilst this chapter has focused a lot on environmental sustainability, social conditions relating to employment and human rights, as well as the impact and mediation with local communities in laboratory-grown diamond regions, are fundamental to ensuring that when it comes to water usage, laboratory-grown diamonds can justify their ethical sourcing claims.

There is less access to published data and information about the social footprint of laboratory-grown diamond manufacturers and they are not held to account on reporting guidelines.

Additionally, as laboratory-grown diamond production has a business model that relies on technology-based manufacturing, the number of employees it must hire for direct production is significantly smaller than that of the natural diamond industry. There is also much less local procurement and incomparably less infrastructure and social investments made or partnerships developed with local communities.

This means that laboratory-grown diamonds do not have the same socio-economic benefits for communities or a positive social multiplier effect as natural diamonds have. The natural diamond industry operates largely in developing countries, so it contributes to the important economic development of producer countries.

Read more about this later on in our study.

Accurate depiction of impact in carbon capture claims

A number of laboratory-grown diamond producers and retailers make certain sustainability claims such as offering carbon-negative products, as well as capturing carbon.

Although some of these organizations highlight their use of carbon capture technology as an important way to mitigate the environmental impacts of production, data shows that the actual volumes of CO2 contained in these diamonds is minuscule.

Carbon capture usually involves collecting CO2 from industries that emit high levels of greenhouse gases, like fossil fuel power generation, and injecting it deep into geological formations. An independent report by Prizma explains⁴⁹ that carbon capture, storage and utilization facilities currently recover over 45 million metric tons of CO2 annually.

In comparison, the carbon locked in laboratory-grown diamonds is negligible and therefore the actual impact does not match their green claim. The amount of carbon locked in a carat of laboratory-grown diamond (0.2 grams of carbon) is the equivalent of the carbon emitted when sending and receiving one to two emails.

The report by Prizma also found that claims of CO2 capture or “carbon-negative” claims mainly refer to the actual creation of unpolished laboratory-grown diamonds, meaning when the seed crystal is placed into a kiln, high-pressure temperature apparatus, or vacuum chamber. Yet this one activity alone does not represent a laboratory-grown diamond’s true carbon footprint.

Laboratory-grown diamonds are refined in carbon-intensive industrial environments, with significant resources and capital required to meet production targets. Steps such as cutting and polishing, setting in precious metals, marketing, packaging, and distribution all generate CO2 and require significant water, computational power, and capital. Laboratory-grown diamonds will also move between facilities as they are being polished and displayed in jewellery, further increasing the carbon intensity.

Carbon Capture Claims

In one year, a mature tree will absorb on average more than 48 pounds of CO2 from the atmosphere (and release oxygen in exchange!). This is the equivalent of carbon locked in close to 30,000 carats of laboratory-grown diamonds.⁵⁰

What is the natural diamond industry
doing to reduce its carbon footprint
and protect biodiversity?

FACTCHECK:

The natural diamond industry has set out on its journey to decarbonize in line with global climate targets. As part of their carbon reduction strategies, NDC members are developing renewable energy projects, often in developing countries where it is harder to source energy, as well as engaging in carbon offsetting projects and investing in programs to sequester carbon.

Companies like De Beers Group are committed to becoming carbon neutral by 2030⁵⁴ and Rio Tinto has set the goal of achieving net zero emissions by 2050⁵⁵.

The natural diamond world protects the biodiversity of an area that is considerably larger than the land they use. As much as 99% of the waste from diamond recovery is rock and 84% of the water used in diamond recovery is recycled⁵³. The natural diamond industry abides by global environmental standards and stringent national laws

Before a single diamond is recovered, environmental permissions must be granted by governments with a legal obligation for ongoing monitoring, reporting, and closure plans.

The previous chapter sought to address misconceptions surrounding sustainability claims made about laboratory-grown diamonds. Now, we look to the natural diamond industry to explore how leading players are focusing on mapping and reducing their carbon footprint.

Factors that influence the difference in carbon emissions recorded by the industry

There are many contributing factors to the difference in carbon emissions recorded by the industry. These include mainly the availability of clean energy at mine locations, the production or yield capacity of a mine, and exactly which stages of mining are included in methodologies.

It is estimated that for a 1 carat polished natural diamond, the emissions are 106.9kg CO2e in 2019 (Scope 1 and 2)⁵⁷. This equates to driving 265 miles in a medium-sized car that runs on gasoline and driving just less than the distance between Los Angeles and Las Vegas⁵⁸.

How is the natural diamond industry working to decarbonize?

The natural diamond industry has set out on its journey to decarbonize in line with global climate targets. Leaders like De Beers Group have set the goal of becoming carbon neutral across their operations (Scope 1 and 2) by 2030 and are making progress, having achieved a 6% year-on-year reduction in energy intensity in 2023⁵⁹. Progress is tracked against a detailed pathway to carbon neutrality. Rio Tinto has the goal to reduce GHG emissions for Scope 1 and Scope 2 by 50% by 2030⁵⁷.

There are many opportunities for large-scale mining companies to reduce their Scope 1-3 emissions and NDC members are demonstrating progress. This section outlines how companies are working to decarbonize and where future efforts can be concentrated.

Reducing impact through carbon absorption, offsetting and conservation projects

Beyond emissions reduction strategies, NDC members are actively involved in offsetting projects and conservation efforts that help to remove carbon from the atmosphere and thus contribute to their climate goals.

For the emissions that cannot be mitigated or replaced with alternative energy sources, companies are engaging in offsetting projects like the Wonderbag initiative, which reinvests carbon offset financing back into communities and is verified by numerous carbon standards and protocols⁶⁴.

A final example is CarbonVault, which is a research program supported by De Beers Group that is dedicated to exploring ways to lock away carbon in kimberlite⁶⁵.

Petra Diamonds also joined the initiative looking at carbon sequestration through the mineralization of kimberlite tailings, in partnership with academic institutions. A publication resulting from the research states that weathering of coarsely processed kimberlitic material supports a diverse microbial community and produced secondary carbonate minerals. The occurrence of photosynthetic bacteria suggests these organisms may have served as a catalyst and a conduit for the transformation of atmospheric CO2 into (Ca, Mg) carbonates. The observation of these carbonates in historical kimberlite residue exemplifies the capacity for these anthropogenic deposits to sequester carbon, providing a novel carbon capture process for the diamond industry⁶⁶.

SPOTLIGHT:
DE BEERS GROUP AND KELP BLUE

De Beers Group has launched a partnership for a pilot of its first nature-based climate solution. It has invested $2 million in Kelp Blue, a company that plants kelp forests across the world to improve the health of oceans, whilst also sequestering carbon emissions⁶⁷. Together, De Beers Group and Kelp Blue are working to plant a giant kelp forest off the coast of Namibia, helping support an ecosystem for 800 species⁶⁸.

IMAGE: DE BEERS / KELP BLUE

What is the natural diamond industry doing to protect biodiversity?

FACTCHECK:

Members of the NDC are always working, often in partnership with governments and local communities, to reduce the impact that natural diamond mining can have on the environment. As much as 99% of the waste from diamond recovery is rock and 84% of the water used in diamond recovery is recycled⁶⁹. The focus on stewardship of diamond mines by NDC members begins from the exploration phase through to the closure phase and is regulated by global environmental laws as well as national and industry regulations.

Every diamond mining operation has a different environmental impact, depending on the type of mining involved – whether it is alluvial, beach, marine or pipe mining. Equally, it is important to distinguish between artisanal and small-scale mining (ASM) and modern large-scale diamond mining when discussing the environmental impact. ASM represents 10-15% of the natural diamond market⁷⁰ and refers to mining by individuals, groups or cooperatives that often take place in the informal sector of the market⁷¹. There is often limited data available on the footprint of the ASM sector. These smaller organizations, even when publicly listed, may face fewer requirements for compliance with regulations and reporting standards. There are numerous operational measures being taken by the natural diamond industry to mitigate and reduce the impact on the environment. This includes conservation efforts and rewilding projects as well as waste and water management.

There are numerous operational measures being taken by the natural diamond industry to mitigate and reduce the impact on the environment. This includes conservation efforts and rewilding projects as well as waste and water management.

Information surrounding diamond recovery processes provided by NDC members details that no chemicals are used in the process, making it one of the cleanest forms of mining. There are changes to the landscape during the period of mining as it creates waste rock piles. However, these are reclaimed by the landscape as part of mine closure plans which are done under the strict supervision and approval of local communities and governments. Topography is not the same as damage. Land can be restored to land use acceptable to the local community.

In recent years, there has been an important focus on water reuse and recycling. During the diamond mining process, water reuse and recycling members consume water from a variety of sources including surface water, groundwater, and third-party supply⁷². As diamond recovery is reliant on a mechanical crushing process, water is more suitable for recycling and reuse⁷³. Large-scale mining companies are working to reduce their dependencies, especially in water-scarce regions, by promoting the use of water recycling. For example, in 2022 Petra recorded that their water recycling initiatives had resulted in 80% of the water used being recycled on-site⁷⁴.

What is the industry doing about the waste from mining?

Over 99% of waste produced by NDC members is rock, which is disposed of on-site and eventually reclaimed as part of the landscape during the mine closure and rehabilitation⁷⁵. De Beers Group separates non-mineral waste at the source across a variety of materials ranging from metals, glass and plastic through to batteries⁷⁶. De Beers Group majority shareholder Anglo American has also developed a Materials Stewardship strategy to encourage waste management focused on the principles of the circular economy⁷⁷. Petra Diamonds recorded in 2022 that it had recycled 85% of waste from its local operations⁷⁸.

Large-scale mining companies recognize the value of biodiversity and ecosystem services. They employ geologists, biologists and environmental experts to develop programs and ensure all operations are in compliance with environmental regulations and that the land is managed and protected correctly. Through policy and reporting standards, the companies are committed to regular monitoring and sharing information on energy usage, air quality, vegetation, and biodiversity impact.

Research conducted by environmental consultancy ERM details NDC members efforts to work towards the United Nations Sustainable Development Goal 15 – Life on Land. NDC members’ protect close to four times the land they use for mining through biodiversity conservation and wildlife protection. At a significant 2,020 square km, the size of the land conserved for biodiversity is equivalent to the size of the total area of New York City and Los Angeles. It is also comparable to the size of four cities, New York City, Washington, Chicago and Las Vegas combined (1,912 square km)⁷⁹.

Here are some examples. De Beers operations are implementing measurable actions aimed at preventing biodiversity loss and restoring and protecting ecosystems at scale. To reach the Group goal of net-positive impact by 2030, each operation requires an active Biodiversity Management Programme. In 2023, all operations made significant progress on their biodiversity baseline assessments. This complex work has combined field data with remote and innovative technologies to provide a baseline condition of significant biodiversity within each operation’s area of impact. The company notes that several of their operations measure compliance against the Towards Sustainable Mining (TSM) biodiversity protocol, an industry-led voluntary certification program developed by the Mining Association of Canada⁸⁰.

As part of the focus of the De Beers Group on protecting the natural world, they protect land for dedicated conservation of flora and fauna in South Africa and Botswana.

These properties include the Venetia Limpopo Nature Reserve in South Africa and the Orapa Game Park in Botswana. As diamond mines and the surrounding areas are highly secure, these properties provide a safe haven and vital habitat for some of southern Africa’s most celebrated and threatened wildlife, including rhinos, elephants, giraffes, and zebras.

This rich diversity of species is thanks in large part to the dedicated conservation efforts of the on-site De Beers ecology teams that manage the reserves. In addition to providing protected habitat, the properties are also host to scientific research programmes as well as educational programmes with local schools and tourists to support local economic development.

Another case is the De Beers Group Moving Giants initiative, which has worked to safely translocate elephants with the Peace Parks Foundation.

Other examples include Petra Diamonds, who have funded a four-year BirdLife Africa Secretarybird project on an endangered bird species. This resulted in the publication of a scientific article on the feeding and breeding of the bird species.

Petra Diamonds has also started a bee pollinator conservation project where bees are removed from the mining site and placed in a safe environment, empowering community members to engage in beekeeping for economic gain. Operational sites have trained beekeepers to place bees in well-secured hives. One notable initiative involved the Cullinan Diamond Mine, which repurposed an old shipping container into a mobile beekeeping unit. Using refurbished building materials and furniture sourced from the mine, the container was equipped with all the necessary tools for honey extraction and bottling.

In FY2024, this beekeeping unit was donated to Bongi Bees, a training facility founded by Lulu Letlape. Bongi Bees focuses on empowering local women through sustainable beekeeping practices. The addition of the “honey factory” container significantly boosted Bongi Bees’ honey production, increasing from 20 kg per week to 80 kg.

Rio Tinto is managing Wildlife Monitoring Programs. Similarly, RZM Murowa have a strict relocation program of crocodiles and pythons with the support of the local Parks and Wildlife Authority.

Invertebrates constitute most of Earth’s species and are vital to global ecosystem functioning. They are considered in environmental impact assessments and monitoring programmes. Due to the hyper-diversity of invertebrates, the use of indicator groups is of great value in the rehabilitation progress assessment at mines.

An unusual new species of ant belonging to the genus Solenopsis (commonly known as ’fire ants‘ or ’thief ants‘) was discovered during an environmental impact assessment survey at Petra Diamonds’ Cullinan Diamond Mine in 2001. Subsequent surveys at this and other sites throughout South and Southern Africa have resulted in the discovery of several other new and potentially new species. A description of the first new species found at Cullinan Mine will be of great significance and will result in the re-definition of genus-level characters of Solenopsis worldwide. The proposed species name for the first new Solenopsis species discovered here is ’taemane’, North Sotho for ’diamond’, to commemorate the site where it was found.

Mine Closure: impact, regulations and planning

NDC members are focused on creating a sustainable legacy and going above and beyond regulatory and environmental compliance. All members have to comply with international and environmental legislation aligned with standards including ISO 14001, which provides a framework for effective environmental management systems. This runs alongside reporting requirements in line with the GRI Mining and Metals Sector Supplement and other corporate sustainability reporting guidelines and frameworks⁸¹.

The stewardship of mines throughout their life cycle underscores the strict rules that mining companies must follow, related to both post-mining land use and economic plans to support the socio-economic prosperity of communities. Permits are not provided without details of impact mitigation, a sophisticated closure plan and proof of financial resources to support a sustainable exit.

A mining closure plan involves how a site would be managed at the end of its productive life, the activities to achieve closure goals and how the land can be rehabilitated⁸².

In an interview, a representative from De Beers Group noted that “We need to be planning for closure right from the design of the mine.”⁸³, which is what the large-scale mining industry is doing.

The Intergovernmental Forum on Mining, Minerals, Metals & Sustainable Development outlines that closure plans should include stakeholder engagement, risk analysis, close monitoring and maintenance as well as financial assurance and many other areas⁸⁴.

Varying geographies have a range of regulations pertaining to environmental mining regulations and closure plans. For example, in Canada there is the Canadian Environment Protection Act administered by Environment and Climate Change Canada (ECCC).

According to Ryan Fequet, Executive Director for the Wek’èezhìi Land and Water Board, the Northwest Territories (NWT, Canada) have Land Claim Agreements and a unique, progressive and empowering piece of legislation called the Mackenzie Valley Resource Management Act. This ensures a transparent, holistic and integrated approach to renewable and non-renewable resource management. Regional Land and Water Boards of the Mackenzie Valley support licensing on everything from water use and wastewater management to land use. These licenses have strict reporting and monitoring requirements too⁸⁵. Further expansion of their policies and guidelines can be found in the Annex.

In Canada, the Mining Association of Canada’s Towards Sustainable Mining (TSM) standard supports mining companies as they manage key environmental and social risks. An independent board completes an environmental assessment and also uses tools like Socio-Economic Agreements, which sets out commitments and predictions made by a company regarding their impact. This is then monitored and published in a yearly report to the government of the Northwest Territories⁸⁶.

In South Africa, mining regulations begin at the scoping phase all the way through to closure, with mining becoming a listed activity in 2010. The environmental provisions of the National Environmental Management Act (NEMA) No. 107 of 1998 now apply to mine closure certification, resulting in mines having to comply with stipulations of this Act before qualifying for closure⁸⁷. NEMA underlines that public consultation is essential at the early stages of projects.

In Australia, the Government of Western Australia Department of Mines and Petroleum (2017) Mining Rehabilitation Fund – Guidance and The Mining Rehabilitation Fund (MRF) Act of 2012 covers many important issues related to funding the closure and rehabilitation of abandoned mines. This goes against the narrative that mining companies simply enter a region and leave with no accountability⁸⁸.

IN FOCUS: MINING REGULATIONS AND GUIDELINES

Whilst not exhaustive, the list below details initiatives, guidelines and frameworks that highlight the level of regulation on the opening and closure of mines:

Australian Government (2016) Mine Closure – Leading Practice Sustainable Development Program for the Mining Industry: introduction to mine closure and current leading practices from an Australian perspective.
ANZMEC (2000) Strategic Framework for Mine Closure
ICMM (2008) Planning for Integrated Mine Closure – A Toolkit: provides a broadly conceived life cycle and risk-based approach to closure planning.
Mining Association of Canada (2008) Towards Sustainable Mining – Mine Closure Framework: an industry-led initiative to articulate the commitment of member companies to promote responsible mine closure.
NOAMI (2010) Policy Framework in Canada for mine closure and management of long- term liabilities
World Bank Multistakeholder Initiative (2010) Towards Sustainable Decommissioning and Closure of Oil Fields and Mines: provides a policy-oriented series of toolkits related to closure for both oil fields and mines.
Intergovernmental Forum on Mining, Minerals, Metals and Sustainable Development (IGF) (2013) The IGF Mining Policy Framework: Mining and Sustainable Development: lays out a framework that provides a comprehensive model for policy that will allow mining to make its maximum contribution to the sustainable development of developing countries.

Responsible mine closure

With the closure of Argyle in Australia – one of the world’s most iconic natural diamond mines – responsible mine restoration has come into focus. It takes on average 10 years to open a mine. Having a closure plan is a prerequisite to opening a mine, in addition to social and environmental impact assessments which are audited, approved and monitored by governments and local community.

SPOTLIGHT: THE VICTOR MINE

Based in Ontario, Canada, the Victor Mine halted production in May 2019 and demolition of its operational facilities started in 2020. De Beers Group has worked to rehabilitate the mines’ waste rock repositories and separate recyclable and non-recyclable waste produced throughout the demolition.
It has planted over 150,000 spruce trees and rehabilitated approximately 328 hectares of the mine’s disturbed operational footprint, using commercial seed and seedlings propagated both onsite and offsite. The company is using field-based and remote- sensing programs to track progress¹⁰¹.

SPOTLIGHT: RIO TINTO – DIAVIK MINE

Set in the Northwest Territories of Canada, the Diavik mine, owned by Rio Tinto, is set to close in 2025, after opening in 2003. The company has designed the mine to minimize disturbance once it comes to the end of its life. Rio Tinto has used engineering technology and techniques that hold back the waters of the Lac de Gras to minimize disturbance to surrounding wildlife and communities. It has plans to build back the embankment to ensure lake water can flow back into the open pit¹⁰².

Further projects to support responsible mine restoration include Rio Tinto’s collaboration
with RESOLVE, a non-profit organization. They have worked together to launch Regeneration, which is a company that will use re-mining and processing of waste from legacy mine sites to support rehabilitation activities and restore natural environments. Rio Tinto has committed to initially invest $2 million into the company¹⁰³.

Elsewhere, NDC members De Beers Group and Rio Tinto are working together on the Reimagining Closure project with the intention to identify opportunities for life after diamond mining in
the Slave Geological Province (SGP) in the NWT of Canada as mining activity winds down. This focuses on socio-economic planning and support whilst engaging with numerous stakeholders including indigenous governments, federal governments, mining companies, businesses, and communities as well as conservation bodies¹⁰⁴.

The details of these efforts underline that the natural diamond industry is working to minimize the impact mines have on the environment through a focus on land restoration, as well as seeking positive post-mining opportunities via socio-economic rehabilitation for communities in surrounding regions.

Are natural diamonds rare?

FACTCHECK:

Natural diamonds are a finite resource. Global natural diamond recovery peaked in 2005, when rough diamond production was around 30% higher than in 2022¹⁰⁵. The annual recovery of 1 carat diamonds is equivalent in volume to filling an exercise ball.

The process of natural diamond formation means that as an object, they are innately rare. Formation takes place across the span of millions, sometimes billions, of years and occurs in limited zones of the Earth’s mantle at extreme temperatures and pressures¹⁰⁶

Natural diamonds are hard to find and have only been found in rock over the last 150 years. The first diamonds were found in caves in India nearly 4000 years ago and for a long time, this was the only known source. Over time, they have become prized for their perfect shape, hardness, rarity, fire resistance and intense light¹⁰⁷.

These conditions contribute to their rarity, with the annual recovery of 5 carat diamonds and above would fit into a basketball¹⁰⁸.

In fact, today there are only 30 significant natural diamond mines in production, with only 7 mines considered to be classified as Tier 1 deposits. Tier 1 deposits are those which have over US$20 billion in reserve¹⁰⁹.

De Beers Group recorded that over the last 140 years, almost 7,000 kimberlite pipes have been sampled by geologists. Yet, approximately only 60 of these were deemed to be sufficiently rich in natural diamonds to be economically viable for large-scale diamond mining companies¹¹⁰.

Graph: Number of diamond deposits sufficiently rich to warrant development

Many industry experts and analysts believe that the annual recovery of natural diamonds peaked in 2005 at 177 million carats¹¹². Though this recovery has fluctuated, leading analyst Paul Zimnisky notes depleting legacy mines and limited new supply sources, further punctuated by the Covid-19 pandemic, resulted in a significant production decline. Through his analysis, it is predicted that production is expected to remain within a range of 115-125 million carats annually, a much lower figure than 150 million carats recorded in 2017¹¹³.

A major contributing factor to this belief is the declining profile of existing mines and the small success rate of exploration. Petra Diamonds states that the success rate in diamond exploration is estimated at less than 1%¹¹⁴.

Data recorded via the Kimberley Process from 2014 – 2021 illustrates the gradual decline of rough diamonds recovered and traded under the Kimberley Process Certification Scheme (KPCS) over recent times.

Deep pockets and large financial investment are needed to explore new diamond mining opportunities.

Determining the economic viability of these projects also extends to different types of mining, including alluvial mining. Alluvial mining is a process where stones are found in riverbeds or shorelines after kimberlites have eroded over time. Approximately 10-15% of the world’s diamonds originate from alluvial mining, however, geologists have commented that often they cannot tell how many stones there are. This is a key piece of information in determining if reserves justify economic investment¹¹⁵.

The closure of mines which have reached the end of their economic lives include Argyle in Australia, owned by Rio Tinto which closed in November 2020, Victor Mine in Canada owned by De Beers Group which closed in 2019, Voorspoed in South Africa, owned by De Beers Group and Snap Lake, owned by De Beers Group in Canada¹¹⁶.

The termination of operations of mines like Argyle, which once produced up to 40 million carats a year is symbolic of the changing landscape of natural diamond mining¹¹⁷.

Further potential near-term closures include Diavik, Ekati, Nyurbinskaya and Almazy-Anabara which are expected to either reach economic depletion or conclude conventional mining by the end of this decade.

In fact, industry analyst Zimnisky notes that these mines currently account for a combined 17-20 million carats of annual production, representing approximately 15% of global supply¹¹⁸. This represents a significant supply change to the natural diamond industry. De Beers Group is also still exploring new opportunities and in 2022 signed Mineral Investment contracts with Angola to return to exploring the country for new sources¹¹⁹.

Is the industry stockpiling
diamonds to drive-up prices?

FACTCHECK:

Inventories of natural diamond producers fluctuate across periods of time, especially when they are broken down by size or quality of stones. This is because, unlike other industries, natural diamond producers cannot operate a just-in-time production model to match supply with demand. Inventories are also impacted by seasonal demand patterns and by external events such as the global coronavirus pandemic.

Comparisons of production and sales data for NDC member companies shows that over a business cycle, there is no evidence of deliberate stockpiling to systematically drive-up prices. This is because total production and total sales are in line with one another. Bain & Company compiled data from company reports and the Kimberley Certification process to estimate that upstream inventories (i.e. those at diamond mine sites and sorting offices) across the world fell by 40% in 2021, leaving them close to minimal ‘technical levels’¹²⁰.

The factors impacting diamond inventories

There are multiple factors that cause diamond inventory levels to fluctuate over time.

Firstly, unlike other industries, there is a large variance in the size, color and quality profile of what diamonds are recovered each month. These characteristics are dependent on natural geological processes, rather than manufacturing decisions. It also takes several weeks and months for recovered diamonds to travel from mine to a point of sale.

This is because they must be sorted, typically into one of 15,000 categories of rough diamonds according to their size, shape and quality, before being sold or auctioned at sales that are typically held once a month¹²¹. Inventories therefore fluctuate particularly by type of stone.

Seasonal fluctuations in demand can also affect monthly diamond inventories. For example, consumer demand for jewelry is usually highest in the fourth quarter of the year, around seasonal holidays, which can impact the inventory upstream.

Additionally, external events like the global coronavirus pandemic in 2020 or the Financial Crisis of 2008 can cause a reduce in demand and therefore, impact inventories following such events when economies start to recover¹²².

Recent trends

So, what has happened to diamond producer inventories in recent times? As explored in the chapter on rarity, natural diamonds are a finite resource and their recovery peaked in 2005 following the closure of legacy mines and finding new deposits¹²³. Production in 2021 was recorded to be 20% below the level of 2017¹²⁴.

Supply depletion, alongside the strong market demand of 2021 as the world emerged from the pandemic has reduced the inventory of mining companies to low levels¹²⁵.

Bain & Company compiled data from company reports and the Kimberley Certification process to estimate that upstream inventories (i.e. those at diamond mine sites and sorting offices) across the world fell by 40% in 2021, leaving them close to minimal ‘technical levels’ .

To review inventory trends, comparisons of published carat production and sales data over a business cycle can be assessed.

Whilst this does not provide a complete picture, when analyzed over a considerable time, it helps to demonstrate that total production and total sales are in line with one another and that therefore, there is no evidence of deliberate stockpiling to systematically drive-up prices.

According to Paul Zimnisky, upstream inventory levels remain at significantly low levels. Production data is available on companies’ websites¹²⁶ and underlines how the industry is pursuing increased transparency when it comes to production and inventory management.

Through the UN and World Trade Organization mandated Kimberley Process Certification Scheme, explored in our chapter on ethical sourcing, international rough diamond trade is regulated and recorded. Data and statistics arising from the Kimberley Process indicate the levels of diamond recovery and paint a clear picture of the market’s production.

What have been the price trends for
laboratory-grown diamonds?

FACTCHECK:

Prices for laboratory-grown diamonds have fallen from 2016 to 2023. For example, in some cases the price of a 1.5 carat stone has fallen by over 74%. There is a widening price differential between laboratory-grown diamonds and natural diamonds. Whilst the price of natural diamonds has also fluctuated over the last 35 years, on average they have risen by 3% per annum.

How has the pricing of laboratory-grown diamonds changed over time?

Diamonds were first synthesized in a laboratory in the 1950s and the first synthetic gem-quality stones appeared on the market in the 1970s. In these early years, the stones were mostly small, and yellow or brown in color¹²⁷ and production costs were high¹²⁸.

Since the commercial development of CVD technology in the early 2000s, the production costs of laboratory-grown diamonds have fallen dramatically – in line with technological advances, economies of scale and competitive pressures as new producers have entered the market.

Additionally, machines that were previously used to make industrial diamonds have been repurposed for gems. Bain & Company estimated that in the 10 years from 2008 and 2018, the average production costs of a high-quality laboratory-grown 1 carat stone fell by 90%¹²⁹. Retail prices of laboratory- grown diamonds have also declined, though to a smaller extent. When laboratory-grown diamonds began appearing in commercial quantities in the jewelry market around 8 years ago, prices were typically slightly cheaper than those of
natural diamonds.

However, as the laboratory-grown market has expanded, the relationship has diverged.

However, as the laboratory-grown market has expanded, the relationship has diverged.
For example, analyst Paul Zimnisky has noted that in 2016, a round, almost colorless, high quality, 1 carat synthetic stone cost around 10% less than a natural diamond. However by the close of 2022, the differential was as much as 80%, depending on the manufacturer. Zimnisky’s figures illustrate that a typical, generic, 1 carat laboratory-grown stone of this color and clarity was more than 70% cheaper than a natural diamond at the end of 2022.

Sample prices of man-made relative to natural over 7 years

Source: Paul Zimnisky (2023) State of the diamond market March 2023. Available here

How the prices of natural diamonds and laboratory-grown diamonds have changed from 2016 – 2023

Prices for laboratory-grown diamonds have fallen from 2016 to 2023, in some cases, for example for the price of a 1.5 carat stone, by over 74%. For example, according to Zimnisky’s “State of the diamond market” March 2023 report, in 2016, a 1.5 carat natural diamond would have cost $12,125, while a 1.5 carat synthetic would have cost $10,600 – amounting to a difference
of $1,525. However, early 2023, the retail price of a 1.5 carat natural diamond had increased to $13,625, whilst its laboratory-grown counterpart would have decreased in price to stand at $2,445 – representing a substantially larger difference of $11,180. Research conducted by The Gem Academy illuminates the difference¹³². By analyzing 2021 price data for natural diamonds and laboratory-grown diamonds available from two online retailers, they recorded that the cost of a 1 carat natural diamond was $7,355, whilst a 1 carat laboratory-grown diamond cost $2,110, representing a price difference of -71%. Across diamonds ranging from 0.5-3 carat weight, the research stated there was an average price difference of -66% across all sizes¹³³.

The current pricing of natural diamonds

Natural diamond prices reflect their rarity and limited supply. Bain & Company conducted a historical analysis looking at data between 1970 and 2019, in which they noted that polished prices of natural diamonds had risen over the last 35 years by an average of 3% per annum¹³⁴. Post- pandemic, Bain & Company noted that in 2021, rough natural diamond prices grew by 21% and that prices increased by 9% year on year for polished diamonds. Whilst this is below their historic maximums, it illustrated that both rough and polished prices were returning to pre-pandemic levels¹³⁵. Zimnisky has tracked prices of rough diamonds since 2007. Based on an initial index value set at 100 on 31 December 2007, his rough price index stood at 183.4 at the end of March 2023, implying an average annual growth trend of 4% per annum¹³⁶.

The differences in pricing structures between laboratory-grown diamonds and natural diamonds

In addition to the diverging price trends over time, these is also a difference in the pricing structures of laboratory-grown diamonds and natural diamonds. The supply, size and the available quality mix available of natural diamonds depends completely on geology, and as noted in previous chapters, large stones are very rare. The prices of different types of natural diamonds have therefore always reflected this rarity. For example, this means that a 2 carat stone costs significantly more than double the price of a 1 carat stone. As a laboratory-grown diamond is not dependent on geology, the main constraint is the production capacity of each company. A larger synthetic stone requires more energy and takes longer to produce than a smaller one, but the relationship is broadly linear – the production costs for a 2 carat stone are twice that of a 1 carat stone. Whilst prices of natural and laboratory- grown diamonds have diverged, the differences have not been uniform across all sizes and qualities. They have tended to be highest for larger stones. For example, Zimnisky’s data indicates that between the end of 2020 and the end of 2022, prices of 1 carat synthetic stones fell by 24% while prices of 3 carat stones fell by 45%.

Economic policies and geopolitical factors influence the price differential between natural
and laboratory-grown diamonds. The OECD has recorded that many countries are in a highly competitive race to attract diamond trading, with nations offering tax exemptions or special economic zones for activities like cutting and polishing¹³⁷. To stimulate the production of laboratory-grown diamonds at a significant scale, India has implemented new policies to position itself as a competitive marketplace. For example, there has been a recent push by the Indian government to reduce import duties on diamond seeds, an essential component of lab grown diamonds, originating from China. In the latest 2023 Budget, the Union Finance Minister Nirmala Sitharaman abolished a 5% customs duty on imports of seeds used for the manufacturing of rough laboratory- grown diamonds¹³⁸.

Do natural diamonds benefit the
countries where they come from?

FACTCHECK:

Members of the NDC are dedicated to reinvesting in and creating a positive multiplier effect across the communities they work with, in line with their commitments to the UN Sustainable Development Goals – especially on areas surrounding alleviating poverty, decent work, health and wellbeing, fair wages and reduced inequalities. Up to 80% of rough diamond value can remain within local communities in the form of local purchasing, employment benefits, social programs and investment in infrastructure as well as the taxes, royalties and dividends paid from the industry to respective governments¹³⁹.

Perceptions about economic inequalities across the natural diamond supply chain are outdated and tainted by a history of power imbalances.

Today, this is no longer the case. The natural diamond industry has generated significant economic contributions to many developing nations that are diamond producing countries. This has created a positive multiplier effect for countries like Botswana and Namibia. The flourishing of these economies fights the paradox of the ‘resource curse’.

Enriching the lives of diamond mining communities

The natural diamond industry is often perceived as a mining industry that does not take care of the regions from which it extracts minerals and diamonds, and that operates only for the benefit of organizations in the West. Perceptions of legacy issues such as colonialism and corruption of large-scale diamond miners are often outdated. These companies are heavily regulated and are genuinely invested in the economic and social prosperity of the communities they have worked with for centuries.

The natural diamond industry supports the livelihoods of 10 million people across the world who are involved in the diamond supply chain¹⁴⁰.

It is important to note that many mining companies are partially owned by local governments, which means they receive direct economic benefits and impact the strategic direction of the mining operations. This includes De Beers Group’s operations in Namibia and Botswana.

NDC member companies make a significant socio- economic contribution to the local communities and governments where they operate. This can be in the form of local employment and training, local sourcing of products and services as well as health and education programs and training for local suppliers and businesses, through investment in infrastructure. They aim to ensure that local communities share in the success of the mine whilst it is in operation and also prepare for their future after mine closure.

Table 3 – Summary of socio-economic benefits created by NDC members¹⁴¹

Research conducted by sustainability consultancy ERM determined based on 2019 and 2020 data that countries who host mining operations gain significant opportunities for development and industrialization, especially in regard to the purchasing of goods and services within a given region, which prevents a leak in investment and procurement being transferred elsewhere. It recorded that the total procurement spend by NDC member companies in these countries exceeded spend on wages, taxes, royalties and community investment combined¹⁴².

It was also reported that approximately $3.2 billion was spent with local suppliers, defined as those within the country of operation. This represented over 85% of all procurement spend¹⁴³. These figures indicate how serious the natural diamond industry is about ensuring their operations benefit communities of host mining countries. In 2019, it was also recorded that the natural diamond industry has made a total economic contribution of at least $9.64 billion to local communities¹⁴⁴.

NORTHWEST TERRITORIES

Namibia neighbors Botswana and also demonstrates how positive socio-economic returns can arise from the natural diamond industry. Diamonds generate 20% of Namibia’s foreign export earnings and the country receives 80 cents of every Namibian dollar generated by Debmarine Namibia, its 50:50 joint venture with De Beers Group¹⁵². According to the World Bank, the adoption of new marine mining technologies for diamonds in Namibia in 2004 led to an increase in production and helped the economy achieve historically high growth of 12.3%. As of 2021, diamonds remain Namibia’s most important product in the mining sector, accounting for close to 68% of mineral output and 45% of foreign exchange earnings¹⁵³.

It is not only regions in Africa that stand to benefit from the natural diamond mining industry. It is a foundational industry for the Northwest Territories (NWT) in Canada where it is the largest private sector industry and contributed 24% of total GDP in 2020¹⁵⁴. Data from the 2021 Government of the Northwest Territories Socio-economic Agreement Report for Mines operating in the NWT recounts how the mining industry contributes to construction, transportation, retail and real estate, alongside the direct benefit of wages in 2021. Since 1996, NWT diamond mines have provided 32,137 person years of employment cumulatively and contributed over $24 billion to the economy. Of this, nearly $17 billion went toward NWT businesses and $7.5 billion to Indigenous-owned NWT businesses¹⁵⁵.

SPOTLIGHT: BOTSWANA

The southern African nation of Botswana illustrates the power the natural diamond industry has to uplift communities and create a positive socio-economic impact. Diamonds represent 88% of Botswana’s total exports and the industry currently contributes around 35% of income to fiscal revenue¹⁴⁵ and contributed 33% of Botswana’s GDP in 2021¹⁴⁶.The development of the industry has helped Botswana avoid the resource curse and supported employment and growth in the economy through a focus on local procurement and development programs for SMEs such as the Tokafala and Zimele program, alongside investments in capital works and infrastructure¹⁴⁷.

Revenue from diamond sales to the government is generated by income tax, royalties and a share of the company’s profits as dividends from Debswana, its 50/50 joint venture with De Beers Group¹⁴⁸.

Debswana has existed for over 50 years and the venture held between the government and De Beers means that it sells 75% of its output to De Beers Group, while 25% goes to the state-owned Okavango Diamond Company¹⁴⁹. De Beers is 15% owned by Botswana and the Diamond Trading Company Botswana (DTCB) is 50% owned by the government of Botswana. The World Bank has reported that the arrangement that enables the government to generate revenue from diamond mining is approximately 80 cents of every dollar of profits generated by Debswana¹⁵⁰. Activities like this have contributed to a rise in prosperity and per capita income, which following independence in 1967 stood at around $80 a year but in 2008 reached $6,000 a year¹⁵¹. Revenue from natural diamonds contributes to a school system providing free primary education to every child in Botswana.

The impact of contributions from Natural Diamond Council members

NDC members are dedicated to reinvesting and creating a positive multiplier effect across the communities they work with in line with their commitments to the UN Sustainable Development Goals, especially on areas surrounding alleviating poverty, decent work, health and wellbeing, fair wages and reduced inequalities.

According to an ERM report, NDC members paid close to $2 billion directly in salaries and benefits in 2019¹⁵⁶.

Commitment to societal impact is underlined by the fact that NDC members invested over $165 million in social programs in 2019 that focused on community development initiatives related to agriculture, enterprise development, education and skills development, healthcare, and infrastructure¹⁵⁸.

There are over 150 social and infrastructure investment and philanthropy initiatives that take place across various areas including agriculture, enterprise development, education and skills development as well as healthcare, sports, arts and culture. These activities generate $16 billion net profit annually .

Mining companies’ response during Covid-19 highlights their dedication to support communities. For example, during the pandemic, De Beers Group was active in Botswana and provided 24 clinics with Personal Protection Equipment (PPE), accommodation for medical personnel, food parcels for vulnerable households, water relief for local communities, 250,000 face masks from local SMEs, remote support for entrepreneurs, 20,000 liters of sanitizer produced in partnership, $50,000 to tackle gender-based violence and a PCR test machine for a hospital¹⁵⁹.

SPOTLIGHT: DE BEERS GROUP HIV DISEASE MANAGEMENT PROGRAM

Natural diamond revenue is helping African nations work to combat HIV/AIDs. The De Beers Group HIV Disease Management Program was launched by Debswana in 2001 with the Government of Botswana. It was a first of its kind initiative aimed to tackle HIV and prevent, detect and treat HIV and AIDs and offers free antiretroviral treatment to employees and their families. De Beers Group recorded that 89% of employees knew their HIV status in 2018 compared with 26% in 2015, and that the uptake of HIV treatment has risen from 90% to 95%¹⁶⁰. In 2020, they marked more than 11 years of no babies being born with HIV to De Beers Group employees or their spouses¹⁶¹.

SPOTLIGHT: DIAMONDS DO GOOD

Diamonds Do Good, formerly the Diamond Empowerment Fund, is a global non-profit that works to support initiatives that empower people and their development in diamond communities. It supports beneficiaries in Africa and India including the African Leadership Academy in South Africa, Botswana Top Achievers Program in Botswana, The Diamond Development Initiative in the Democratic Republic of Congo (DRC), the Flaviana Matata Foundation in Tanzania and Veerayatan’s Colleges of Pharmacy, Engineering & Business Administration in India¹⁶². It aims to fund programs and provide grants that focus on high-quality education for younger generations¹⁶³.

SPOTLIGHT: DEVELOPMENT DIAMOND INITIATIVES

Based in Nigeria, Diamond Development Initiatives (DDI) is a non-profit that works with an ecosystem of businesses, government and social services to encourage development and growth in businesses involved in diamond mining and promote sustainable environemtal and social impact.

In recent times, it has run projects such as operating mobile schools in countries like the DRC to help students pass exams. Through its programs over 200,000 miners have been registered in the DRC, 10 miners’ cooperatives have been formed and legalized, 121 children in mining communities have been given access to remedial education, 13 mining operations have been certified compliant to the Maendeleo Diamond Standards in Sierra Leone and several previously mined sites have been environmentally rehabilitated¹⁶⁴.

The DDI’s work with Resolve

In 2020, the DDI joined forces with non- governmental organization RESOLVE to focus on responsible sourcing of artisanal diamonds by looking at conflict resolution, poverty reduction and heightened levels of social due diligence. They created the Maendeleo Diamond standards, which were the first set of standards for ethical artisanal diamond production and supply chain security¹⁶⁵.

Their partnership work in Sierra Leone is focusing on land reclamation and restoration as well as reconciliation for communities affected by conflict. They are working to ensure responsible sourcing and help artisan diamond miners move away from poverty. The DDI has been supported by members of the NDC include De Beers Group and Rio Tinto, as well as retailers like Tiffany & Co
and Cartier¹⁶⁶.

How are natural diamonds
ethically sourced?

FACTCHECK:

The industry is highly regulated. Under the Kimberley Process mandated by the United Nations and the World Trade Organization, all rough diamond trade is strictly regulated to ensure it is conflict-free. Multiple initiatives, processes and policies ensure that the industry moves beyond compliance on social issues across the supply chain. There is a robust set of checks and balances in place, including audits of the largest industry players, to enshrine the importance of ethical sourcing.

Ethical sourcing is essential to the practices of the natural diamond industry. It means that products and services across the supply chain are obtained in an ethical way. This includes upholding labor rights, decent working conditions, no child labor, the existence of health and safety measures and importantly, strong business ethics with respect for local communities¹⁶⁶. In the context of diamond mining, this includes sourcing conflict-free diamonds.

For many years, the natural diamond industry has worked hard to reform and address legacy issues related to mining practices and conflict diamonds. Now, the whole sector is held to extremely high trading standards. This is in part because 85% of the world’s diamonds by volume and 95% by value¹⁶⁷ are extracted and marketed by large mining companies that are public entities which are held to account by shareholders and stakeholders for their social and environmental impact.

Pressure for mine-to-market supply chain transparency and traceability of diamonds has contributed to building the importance of ethical sourcing for the natural diamond community.

Multiple pillars exist to ensure ethical sourcing and compliance across supply chains. The Kimberley Process or Kimberley Process Certification Scheme (KPCS) is a foundational block for the industry in achieving this. As a joint initiative between governments, diamond industry bodies and civil society. It is mandated by the United Nations and the World Trade Organization, to stem the flow of conflict diamonds.

Since it became operational in 2003, it has worked to ensure that only rough diamonds with KP certificates can be legally traded and that only KP compliant countries are able to operate in the international diamond trade. These countries must commit to transparency and exchange of statistical data, export and import controls, and only legally trade with other KP participants. It stipulates that all international shipments of rough diamonds must be accompanied by a certificate that guarantees they are conflict-free.

Now, over 80 countries participate in the process, and it has been recorded that conflict diamonds account for less than 1% of recorded rough diamond trade, a number that once stood at 4-15% in the 1990s.

Whilst the KPCS definition refers to conflict diamonds, the natural diamond industry has built on this to expand ethical sourcing beyond conflict free. To ensure human rights are protected it follows numerous other policies and frameworks.

The industry’s sourcing practices are held to account by legislation such as the Dodd-Frank Act in the United States which implies that any single company assumes its own direct ethical responsibility without transferring this issue to international organizations¹⁷¹. In this report’s Traceability chapter, we touched on the importance of OECD Due Diligence Guidance, UK Modern Slavery Act, California Transparency in Supply Chains Act, the EU Conflict Mineral Regulation and the London Metal Exchange Responsible Sourcing initiative.

Industry standards

The natural diamond industry has committed to measures that encompass social standards and business ethics. This includes codes of conduct, guidelines and third-party oversight measures, alongside in-house due diligence structures. These processes are continuously evolving as industry players proactively address social issues and work to protect human rights through ethical sourcing.

A few examples include:

WORLD DIAMOND COUNCIL SYSTEM OF WARRANTIES

The System of Warranties (SoW) was developed in 2002, to address areas outside the KPCS.

It requires professional buyers and sellers of rough diamonds, polished diamonds and jewelry setters with diamonds to include a warranty statement on invoices and memos each time a diamond changes hand. This is with the objective of assuring the next buyer that it originated from sources in compliance with the KPCS and to confirm its conflict-free origin. The SoW includes responsible business practices related to human and labor rights as well as anti-money laundering and anti-corruption.

Warranty statements are made each time the diamond passes along the supply chain, not
just at export and import stages. It has become challenging to do business without the SoW as
it is demanded by associations, companies and countries like Belgium, where it is integrated into statutory auditing procedures.

Abiding by the SoW is a condition of membership to organizations like World Federation of Diamond Bourses (WDFB) International Diamond Manufacturers Association (IDMA), and the Responsible Jewellery Council (RJC).

The SoW guidelines support universally accepted principles of human and labor rights that prioritize ethical sourcing and references the UN Guiding Principles on Business and Human Rights, the ILO Declaration on Fundamental Principles and Rights at Work, the UN Convention Against Corruption, and national AML guidelines that comply with the FATF’s 40 Recommendations on Money Laundering for Dealers in Precious Metals and Stones¹⁶⁸.

Retailers abide by the SoW and it is cited by multiple jewelers including De Beers, Chow
Tai Fook and Tiffany & Co in their supplier codes of conduct.

RESPONSIBLE JEWELLERY COUNCIL CODE OF PRACTICES

The RJC is a not-for-profit standards authority working to help the jewelry industry create a sustainable supply chain. The Code of Practices defines responsible ethical, human rights, social and environmental practices that certified members must adhere to. Members are upheld against the ISEAL Code of Good Practice for Setting Social and Environmental Standards too.

The Code of Practices has thorough rulings on human rights due diligence, responsible sourcing in high-risk areas, labor rights on contracts, wages, health and safety, grievance procedures, child labor, forced labor, freedom of association and the right to collective bargaining¹⁶⁹.

SPOTLIGHT: DE BEERS GROUP

Companies in the industry like De Beers Group have introduced their own standards which are independently audited by third parties to ensure ethical sourcing. Their Best Practice Principles (BPPs) Assurance Program aims to guarantee that diamonds are not only conflict-free but that they abide by international human rights frameworks and labor regulations. The standards are applied throughout the De Beers Group value chain and over 2,600 entities which employ nearly 350,000 are subject to these standards¹⁷⁰.

Another example is the De Beers Group Kalahari Dream venture. This organization sells natural diamonds directly to the consumer where they have been sourced directly from southern African mining companies like Debswana with high ethical standards. These diamonds have been manufactured and polished by local workshops which employ artisans and communities in Botswana and can guarantee that the highest social standards have been followed¹⁷¹.

SPOTLIGHT: GEMFAIR^TM

GemFair^TM is a program that connects artisanal and small-scale miners to the global market through digital technology and the assurance of ethical working standards.

It was first piloted to create a secure and transport route to market for small-scale diamonds. With a digital record, each exporter parcel can be tracked via GemFair^TM until it reaches its destination.

Not only does GemFair^TM help to improve business and environmental practices, but it also ensures miners are paid fair value for their diamonds and provided with access to training¹⁷².

In 2019, GemFair^TM operations were expanded in Sierra Leone to scale its positive impact and extend the benefit of the program and heightened traceability to more miners¹⁷³.

What to consider when purchasing ethically sourced diamonds

It’s important to ask the right questions and to know what to look for when purchasing a natural diamond to ensure it is ethically sourced.

Here are a few of our tips:

Ask your jeweler if they have a certification or if they work with suppliers that have 3rd party certifications. This includes the Responsible Jewellery Council who help warrant ethical processes employed.
Ask that your retailer or jeweler works with diamonds that abide by the Kimberley Process Certification Scheme (KPCS) if trading in rough diamonds.
Look for certification and brand marks about their sourcing for example the Tiffany & Co provenance guarantee.
Research whether the jeweler is a member of industry standards and initiatives¹⁷⁴.
Review the brand’s own policies and see if they go beyond the KPCS.

IMAGE: PETRA DIAMONDS

What are the working conditions like
in the natural diamond industry?

FACTCHECK:

Members of the NDC ensure that working conditions related to fair pay, health and safety, employee benefits and protection of human rights are followed to the highest global standards within their mining operations. Nearly all (99.7%) employees of NDC members are hired locally and according to data from 2021 were paid on average 64% more than the national average salary¹⁷⁵.

Diamond recovery is mostly carried out by large- scale companies using modern equipment and mining practices. All NDC members have adopted the goal of zero-harm in the workplace. Workplace safety incidents recorded by NDC members are significantly lower than in other industrial and mining sectors.

NDC members seek to build long-term partnerships with the people they employ. They seek to offer safe, high-quality jobs and fair working conditions for all their employees and contractors in terms of wages, working hours, non-discrimination and protection from harassment, as well as the right to collective bargaining and the ability to follow grievance procedures¹⁷⁶. One third, and growing, of the natural diamond mining industry workforce are women, and 30% of board members of NDC members are women.

Employment benefits created by NDC members¹⁸²

As explored in our chapter on ethical sourcing, the industry is highly regulated under trading and legal frameworks by the United Nations and World Trade Organization. Multiple initiatives, processes and policies ensure that the industry moves beyond compliance on social issues across the supply chain. Read more about ethical sourcing in the natural diamond industry here.

The industry also adheres to the Responsible Jewellery Council’s Code of Practices, the De Beers Group Best Practice Principles Assurance Program, the Petra Human Rights Policy and the Rio Tinto Human Rights Policy and Supplier Code of Conduct.

The Responsible Jewellery Council’s Chain-of- Custody Standard requires companies to establish documentary evidence of business transactions along the supply chain and to confirm they are not causing adverse impacts in conflict-affected and high-risk areas. This includes understanding more about the working conditions at each stage of production¹⁷⁸. With a focus on miners in the supply chain, the Resolve and Diamond Development Initiative, Maendelo Diamond Standards and Initiative for Responsible Mining Alliance, amongst many others, are working to enshrine workers’ rights on the ground.

The large-scale mining industry works to do this, not only to meet regulatory requirements but because they are deeply invested in the livelihoods of the millions of workers they employ.

NDC members adhere to the highest labor standards shaped by the:

UN Guiding Principles on Human Rights
International Labour Organisation
GRI Sector Standard for Mining
OECD Due Diligence Guidance for Responsible Supply Chains of Minerals

Health and safety

All NDC members have adopted the goal of zero- harm in the workplace.

Keeping employees safe is the responsibility of everyone on site. It requires a strong safety culture in which no shortcuts or compromises are acceptable if they could result in an injury. It also requires following strict rules and processes, wearing the appropriate protective equipment, analyzing every task for its safety risk before performing it and continuously training teams to employ safe behaviors.

At workplaces of NDC member companies, work shift starts with a safety review of the last shift and a discussion of risks associated with the next shift. Leaders engage continuously with their teams on the ground to coach, train and correct them. New technologies are continuously introduced, such as vehicle proximity detection equipment or geological movement monitoring devices. The safety performance of every operation is rigorously monitored and is a very important driver of a leader’s performance evaluation. No leader with a poor safety record will be promoted¹⁷⁹.

From De Beer’s Good To Great Program, the Petra Mining Occupational Safety and Health initiative run in cooperation with the South African Chamber of Mines, and the Rio Tinto Critical Risk Management program, NDC members are focused on the health and safety of their workers at all times.

IMAGE: DE BEERS GROUP

Gender diversity in the workplace

NDC members are focused on encouraging gender diversity at an executive level, as well as throughout the entire workforce. One third of the natural diamond industry (for mining) are women which can have a positive impact on their family’s prosperity and inclusivity amongst communities¹⁸⁰. From a corporate governance perspective, 30% of board members of NDC companies are women¹⁸¹.

This surpasses the average for similar sized companies as according to OECD, only around 1 in 20 of the Top 500 multinationals have female representation above 30% at a board level¹⁸². Rio Tinto provides an example as Angela Bigg was the first appointed female President and CEO of the Diavik Diamond Mine¹⁸³ and Kellie Parker is the Chief Executive for Australia¹⁸⁴.

SPOTLIGHT: LUCARA DIAMOND

The Globe and Mail’s third benchmark of female leaders in Canada recognized Lucara Diamond as the second highest among 74 Canadian companies reported with 75% women corporate executives, including President and CEO, Eira Thomas, as well as Naseem Lahri, Managing Director, Lucara Botswana Proprietary Limited. NDC member Lucara highlights excellent labor practices. For the company’s workers with a permanent contract, they receive a housing allowance, medical aid subsidy, group life insurance, and statutory worker’s compensation. They also have multiple national holiday days and instead of the statutory 25% of pay during maternity leave, the company pays 100% of wages for up to three children. Additionally, instead of a pension scheme, employees are paid a gratuity every three years¹⁸⁵.

Are natural diamonds traceable?

FACTCHECK:

The natural diamond industry is accelerating its traceability initiatives and leveraging technology like blockchain to bring transparency to its supply chains. Historically, tracing raw materials and minerals for diamonds across the globe has been difficult, but now, traceability along the whole mine-to-market diamond supply chain is being realized. Natural diamond retailers are launching their own traceability platforms and collaborating with technology providers to ensure their supply chains meet the demands of global policies on social and environmental regulations as well as heightened sustainability expectations from their customers.

The diamond supply chain consists of mining and trading processes followed by certification, cutting, polishing and manufacturing before a diamond enters the retail landscape and is sold to consumers.

Figure 8 – Diamond supply chain levels.

Supply chain traceability involves tracking the journey of a diamond at each stage of production, from raw material mining through to the moment when it is sold in store. ‘Provenance’ refers more specifically to the details of how a diamond has moved through the supply chain and what exactly happens at each step. Historically, tracing raw materials and minerals for diamonds across the globe has been difficult as there was no centralized digital database for natural diamond certification records.

But now, the mine-to-market diamond supply chain is being realized. The natural diamond industry is focusing on implementing a chain of custody through traceability initiatives that are enabled by technology to ensure diamonds are ethically sourced and real.

Not only can supply chain traceability enhance supply chain efficiencies for the natural diamond industry, but it is also critical to decrease the likelihood of conflict diamonds or synthetic diamonds entering the system. Multiple factors have catalyzed the need for supply chain traceability – such as investor demands for stronger ESG (Environmental, Social, Governance) performance, expectations from customers about social due diligence, as well as heightened regulation across the supply chain. The natural diamond industry is working at pace to achieve full traceability.

From investor demands for stronger ESG (Environmental, Social, Governance) performance, expectations from customers about social due diligence, as well as heightened regulation across the supply chain, the natural diamond industry is working at pace to achieve this.

At a legislative and global guidance level, there are multiple developments that underline the
need for traceability including the Dodd-Frank Act, OECD Due Diligence Guidance, UK Modern Slavery Act and the California Transparency in Supply Chains Act. More recently, the EU Conflict Mineral Regulation and the London Metal Exchange Responsible Sourcing initiative require players to abide by the OECD’s five-step risk-based Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas₁₈₈.

It is no secret that sustainability, transparency and social issues have become a priority for consumers. In its latest Global Diamond Industry report, Bain & Company note that the growing desire for social impact, especially amongst younger consumers, is prompting mining companies to address environmental and social issues, including traceability and transparency¹⁸⁹. Members of the natural diamond industry are working proactively to mitigate these supply chain risks.

The mine-to-market supply chain

Enabled by technology like blockchain, initiatives are being designed by producers, retailers, manufacturers and grading organizations to enhance traceability and share the story of the diamond with customers in order to increase trust.

Blockchain technology creates a peer-to-peer network of trade along value chains to provide a history of transactions for a single product, in this case a natural diamond. It has previously been described as a digital, decentralized, distributed and public ledger of what happens across a supply chain.

For the last few decades, the industry has been reliant on the Kimberley Process Certification scheme to regulate trade in rough diamonds to prevent inflows of conflict diamonds. This paper-based process has since been digitized on blockchain, which has made it more efficient190. The benefits of blockchain technology for the industry are far-reaching. It can ensure that when diamonds are traded on blockchain, each transaction undergoes a clearance process. This helps to ensure that traders comply with regulations related to the Kimberley Process, anti- money laundering and global banking protocols. It also helps to trace a diamond’s lifespan and creates more data for managers in industry¹⁹¹.

SPOTLIGHT: SARINE TRACEABILITY ECOSYSTEM

arine Technologies has built a high- performance tracking system for tracing rough diamonds. Their data-based platform spans the entire pipeline from the mine to the consumer. It connects miners, manufactures and retailers across the world. Retailers who use Sarine’s traceability ecosystem receive a Diamond Journey digital report that provides customers with the story of the diamond¹⁹⁴.

Natural Diamond Council member Lucara Diamond is also leveraging Sarine’s technology to design a solution called Clara. Clara scans diamonds to create digital IDs that are tagged using blockchain and then uploaded to the Sarine platform. Manufacturers can place orders for diamonds based on desired properties and Clara uses the analytics to match each order with the right diamonds. This reduces the number of intermediaries handling the stones and makes it easy to trace with a verifiable digital record¹⁹⁵.

SPOTLIGHT: TRACR ^TM BY DE BEERS GROUP

De Beers Group pioneered digital tracking of a diamond from mine-to-store in 2018 when it followed the journey of 100 high- value diamonds using its blockchain platform, Tracr™. This has since been named one of Forbes top 50 leading blockchain solutions.

How does it work? The Tracr^™ platform combines distributed ledger technology with advanced data security and privacy, ensuring that participants control the use of and access to their own data.

Each participant on Tracr™ has their own distributed version of the platform, meaning that their data can only be shared with their permission, and only they choose who can access their information.

The advanced privacy technologies used by Tracr™ reinforce data security on the platform. The alterable nature of each transaction on the platform ensures that the data cannot be tampered with when the diamond progresses through the value chain.

As of 2022, De Beers Group has registered $2.2 billion total value of diamonds on the platform and 25% of its production by value is recorded. The platform now has the ability to register up to 1 million diamonds per week.

Tracr™ complements the intent of the De Beers Group Code of Origin, which is a customized unique code assigned to each diamond that provides assurance that it is natural, produced with high ethical standards and was discovered by De Beers in Botswana, Canada, Namibia or South Africa¹⁹². As the latest announcement, the Gemological Institute of America (GIA) will also join Tracr™.

Consumers purchasing a diamond traced from the source by Tracr™ and graded by GIA will receive a GIA grading report with enhanced information about the provenance of their diamond¹⁹³.

Everledger is a blockchain technology provider helping to increase traceability of the diamond supply chain for retailers. It traces a jewel’s ownership from mine to ring and as of 2017,
had recorded over 1.6 million diamonds on the platform¹⁹⁶. In an interview, Everledger founder Leanne Kemp stated that “in the case of a diamond, it is unique like a snowflake, so we can identify every single stone,” and that it helps to answer important questions about who was involved in the making and extraction of minerals and gemstones¹⁹⁷. The company works with brands like Brilliant Earth, who stated they have upward of 10% of their diamond inventory on blockchain. How does it work for a brand? Brilliant Earth would buy a blockchain enabled diamond from a mining operator where its unique properties are logged on the blockchain. That assigned record then follows the diamond across the supply chain, from trading to cutting and polishing before being purchased¹⁹⁸.

iTraceiT is a software company based in Belgium that provides traceability solutions to an array of industries.

The company’s traceability solution uses a combination of QR code and blockchain technology to ensure that the traceability information is correctly transferred between companies in a highly secure and reliable environment. In addition, iTraceiT has invested significant development time in automated connections. As the iTraceiT system is entirely digital, it can easily connect to any other system or software.

Figure 9- Source: World Economic Forum¹⁹⁹

There are multiple other initiatives and mechanisms in place to cultivate traceability.

The Responsible Jewellery Council has specific provisions about what its members can claim about the way they source materials like diamonds. Provision 14 stipulates that any company that makes claims about the provenance of materials (source, origin and practices) have to be audited²⁰⁰. The GIA has a specific Diamond Origin report that helps to share the story of the mining of each stone and has a science-based methodology for determining a given diamond’s country of origin²⁰¹.

Luxury brands like Tiffany & Co are leading when it comes to sharing the provenance about their diamonds. In 2019, they began providing geographical sourcing information for customers for diamonds of 0.18 carats or larger with a T&Co serial number. In 2020, they built on this to share details of the journey including where each stone was cut, polished and set.

They also worked with the Initiative for Responsible Mining Assurance to develop a standard that provides the world’s first shared definition of leading practices for large-scale mining operations²⁰².

Luxury leaders like LVMH are involved in the industry’s traceability push too. Alongside Prada Group, Cartier and OTB Group, they founded the Aura Blockchain Consortium, which will be using Sarine’s diamond traceability platform for their jewelry²⁰³.

All these efforts underscore how important reducing harmful supply chain risks and creating a positive impact across each stage of production is for the natural diamond industry. Technology is one tool to achieve traceability, and the industry will have to move beyond compliance and advocate for rigid due diligence across all the countries in which it operates.

This is only the beginning.

Annexes

Annex I

The process of raw material extraction for laboratory-grown diamonds

Annex II

Overview of Northwest Territories (NWT, Canada) regulatory process, by Ryan Fequet, Executive Director for the Wek’ èezhìi (Mackenzie Valley) Land and Water Board.

In the Northwest Territories (NWT, Canada) the finalization of some Land Claim Agreements (or Modern Treaties) in the early 1990s resulted in a unique, progressive and empowering piece of legislation called the Mackenzie Valley Resource Management Act (MVRMA, enacted in 1998). The MVRMA and associated Land Claims created the regional Land and Water Boards of the Mackenzie Valley (LWBs) the Mackenzie Valley Environmental Impact Review Board (MVEIRB) , the Renewable Resource Boards, as well as Land Use Planning Boards; collectively referred to as the Boards. Together, these entities make up the co-management system that ensures a holistic and integrated approach to renewable and non- renewable resource management.

The LWBs, responsible for issuing authorizations required for projects, have established policies, guidelines and standards to guide applicants and resource developers through the environmental impact assessment (EIA), permitting and licensing processes – and to ensure that all projects are designed for closure from the start. The process begins with the requirement for early engagement with land owners, traditional land users and other potentially affected parties. The level of effort for this required engagement is scaled to the nature of the potential resource development project. Similarly, the information requirements related to proposed activities are also flexible to ensure the level of effort is reasonable for the size, type, and location of the activities.

All applications undergo a public review process that takes place on a real-time online platform where all recommendations and the applicant’s responses are visible to the public (Online Review System). Parties and the Board itself may retain technical and traditional knowledge experts to assist with document review and with ensuring that proposed activities would be carried out in the most appropriate way by helping to assess the potential impacts and mitigations; this step is known as preliminary screening – the first of the three levels of EIA.

There are legislated timelines for the LWBs and MVEIRB to carry out their processes, that range from 52 days to three years depending on the nature of the proposed project (where the longer period would include a full Environmental Assessment prior to regulatory permitting).

Because the Boards are administrative tribunals that must ensure procedural fairness, at the end
of each process the Boards produce a Reasons for Decision that explain how all of the evidence that was provided throughout the process was considered. When a Land Use Permit or a Water License is issued by a Land and Water Board, it contains requirements for: management plans, monitoring programs, reporting and the posting of security – which is the amount it would cost for a third party to come in and reclaim the site to ensure there is financial incentive for the project to reclaim the project site.

A standard requirement is that all management plans must be reviewed each year, and any proposed revisions sought by the Licensee must be provided to the respective Land and Water Board for approval. An Annual Report is also a standard requirement and ongoing environmental monitoring and response plans (when pre-defined triggers are met to avoid reaching an unacceptable level of change in the environment) come in monthly or more frequently as needed.

Regular inspections take place by the federal or territorial government to ensure a project is compliant with the conditions of its permit and/or license. Inspection reports and all submissions and correspondence with the Board are made available on the public registry.

Glossary

ASSURE PROGRAM

The Natural Diamond Council established the ASSURE Program in 2019. It assesses the relative performance of Diamond Verification Instruments available on the market. All results can be found via the ASSURE Directory, in addition to evaluation criteria such as diamond false positive rates, diamond referral rates and diamond accuracy.

BLOCKCHAIN

A digital shared database or ledger, that is distributed amongst nodes of a peer-to-peer network. As a database, it stores information electronically and holds a record of transactions which cannot be edited. This means that the history of transactions are permanently recorded and accessible for anyone across the supply chain network.

CARBON FOOTPRINT

The quantity of greenhouse gas emissions expressed in terms of carbon dioxide equivalent (CO2e), emitted into the atmosphere by an individual, organization, process, product or event from within a specified boundary. The word equivalent is used in the metric as other greenhouse gases besides carbon dioxide, such as methane, are also released into the atmosphere but they are incorporated to create one standard figure for comparison and tracking over time.

CARBON INTENSITY

A measure of the carbon footprint (in terms of carbon dioxide and other greenhouse gases emissions) per unit of activity. For diamonds, carbon intensity is typically calculated by totaling the greenhouse gas emissions over a period from a laboratory or mine and dividing this by a measure of production in that period. This is usually either rough or polished carats.

CARBON OFFSETTING

A process that involves a reduction in, or removal of, carbon dioxide or other greenhouse gas emissions from the atmosphere in order to compensate for emissions made elsewhere.

CARBON SEQUESTRATION

Entails the capturing, removal and storage of carbon dioxide (CO2) from the earth’s atmosphere. It’s recognized as a key method for removing carbon from the earth’s atmosphere.

CHEMICAL VAPOR DEPOSITION (CVD)

A process to make laboratory-grown diamonds. CVD uses a small diamond seed crystal andplaces it into a chamber, which is then filled with gases heated at extreme temperatures of around 900-1200°C. As the chamber reaches the right temperature, layers of carbon begin to form on the seed crystal, which then grows into a diamond crystal. CVD involves breaking down the molecules of a carbon-rich gas, such as methane, into carbon and hydrogen atoms, which then are deposited on diamond seeds to produce a square-shaped, tabular diamond crystal.

DIAMOND DEVELOPMENT INITIATIVE (DDI)

A non-profit organisation that works with an ecosystem of businesses, government and social services to encourage development and growth in businesses involved in diamond mining and promote sustainable and social impact. In 2020, it joined forces with RESOLVE in a program merger to strengthen the capacity of the responsible sourcing of diamonds and minerals for communities, companies and consumers. RESOLVE works across various sectors to design sustainable solutions to critical social, health, and environmental challenges by creating innovative partnerships where they are least likely and most needed.

ENERGY EFFICIENCY

Refers to the use of less energy to perform the same task or produce the same result.

ESG (ENVIRONMENTAL, SOCIAL, GOVERNANCE)

ESG is a framework that helps stakeholders understand how an organization is managing risks and opportunities related to environmental, social, and governance criteria.

FEDERAL TRADE COMMISSION (FTC)

An independent agency of the United States government whose principal mission is the enforcement of civil anti-trust law and the promotion of consumer protection.

GEMOLOGICAL INSTITUTE OF AMERICA (GIA)

GIA is an authority on diamonds, colored stones, and pearls. A public benefit, non-profit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry.

GREENHOUSE GAS EMISSIONS (GHG)

Greenhouse gases are gases in the earth’s atmosphere that trap heat causing the greenhouse effect. They include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and sulphur hexafluoride (SF6). These emissions are converted into CO2e using global warming potentials (GWPs) provided in assessments of the Intergovernmental Panel on Climate Change.

HIGH PRESSURE, HIGH TEMPERATURE (HPHT)

A process to create laboratory-grown diamonds. HPHT involves placing a diamond seed into a press inside a chamber which is heated to temperatures of 1300-1600 °C with pressures above 870,000 pounds per square inch. The hot metal plates dissolve the high-purity carbon source and as a result, carbon atoms form on the seed crystal, before the diamond continues to grow.

ISO14001

Sets out the criteria for an environmental management system. It maps out a framework that a company or organization can follow to set up an effective environmental management system.

INTERNATIONAL LABOR ORGANIZATION

A United Nations agency whose mandate is to advance social and economic justice by setting international labor standards.

KIMBERLEY PROCESS CERTIFICATION SCHEME (KPCS)

The Kimberley Process Certification Scheme is the process established in 2003 to prevent “conflict diamonds” from entering the mainstream rough diamond market by United Nations General Assembly Resolution 55/56 following recommendations in the Fowler Report.

LABORATORY-GROWN DIAMOND

A synthetic, man-made diamond created in a laboratory through Carbon Vapor Deposition (CVD) or High Pressure High Temperature (HPHT) processes.

It is an artificial product which has essentially the same chemical composition, physical properties and structure as that of a diamond. The terms “synthetic”, “laboratory-created” and “laboratory- grown” are synonymous with one another. In USA, the Federal Trade Commission also accepts “[manufacturer’s name] created diamond”. Where there is no acceptable local direct translation of the English terms laboratory grown diamond or laboratory created diamond then only the translation of the term synthetic diamond should be used.

DIAMOND MINING

Alluvial mining – An above-ground form of mining that concentrates on gathering diamonds on the surface from deposits of sand, gravel and clay. Beach mining – Involves combing beaches and excavating deposits using machines to move the sand.

Marine mining – A method used for drawing diamonds from the sea with the help of mining vessels.Pipe mining – There are two types of pipe mining. Open-pit mining involves removing the layers of sand and rock found just above the kimberlite. In underground mining, miners tunnel through Earth’s crust to the kimberlite pipe. Tunnels are constructed on two levels, one above the other with funnels built to connect the two.

MAENDELEO DIAMOND STANDARDS

The Maendeleo Diamond Standards (MDS) establish requirements adapted to the specific conditions of artisanal and small-scale diamond mining communities. Maendeleo is a Swahili word meaning development and progress. The standards apply to diamonds mined in conflict- free zones and produced safely with consenting and engaged communities. MDS operations are violence-free, respect human and worker rights, and follow practices that promote environmental responsibility.

NATURAL DIAMOND

A diamond is a mineral created by nature; a “diamond” used on its own always means a natural diamond.

OECD DUE DILIGENCE GUIDANCE FOR RESPONSIBLE SUPPLY CHAINS OF MINERALS

Provides detailed recommendations to help companies respect human rights and avoid contributing to conflict through their mineral purchasing decisions and practices.

RESPONSIBLE JEWELLERY COUNCIL (RJC) CODE OF PRACTICES (COP)

Defines the requirements for establishing responsible business practices throughout the jewelry supply chain, from mine to retail. The COP provides a common standard for ethical, social, human rights and environmental practices, and certification against it is mandatory for all RJC commercial members.

SCOPE 1 EMISSIONS

Covers emissions from sources that an organization owns or controls directly. For the diamond industry, this could include emissions from hydrocarbons, diesel, marine gas, oil or petrol used to power machinery used to mine for diamonds or transport like trucks and ships.

SCOPE 2 EMISSIONS

Scope 2 encompasses emissions that are caused indirectly when energy is purchased and used in production. This could include emissions from electricity generation through to power generators used for buildings and the infrastructure surrounding a given mine.

SCOPE 3 EMISSIONS

Includes emissions that are not produced by the company itself but are a result of indirect activities owned by different stakeholders in the supply chain, like suppliers and transport facilitators.

SOCIO-ECONOMIC AGREEMENTS (SEAS)

A socio-economic agreement is usually agreed between a private organization and a public body. It outlines the commitments and predictions made by a company during its environmental and social environmental assessment including:

• Employment and business opportunities
• Cultural well-being and traditional economy
• Community, family, and individual well-being
• Net effects on government
• Sustainable development

UNITED NATIONS GUIDING PRINCIPLES ON HUMAN RIGHTS

The UN Guiding Principles on Business and Human Rights is a set of guidelines for States and companies to prevent, address and remedy human rights abuses committed in business operations.

WORLD DIAMOND COUNCIL SYSTEM OF WARRANTIES (SOW)

The System of Warranties (SoW) was developed in 2002, by the World Diamond Council. It requires professional buyers and sellers of rough diamonds, polished diamonds and jewelry setters with diamonds to include a warranty statement on invoices and memos each time a diamond changes hand.

Natural Diamond Council Members
Sustainability Reports

Read more about the environmental and social performance of our members here:

DE BEERS GROUP

• Building Forever: Our 2021 Sustainability Report

• Building Forever: 2030 Goals – Progress Update 2021

PETRA DIAMONDS

• Sustainability Report 2022

LUCARA DIAMOND

• Sustainability Report 2021

RIO TINTO

• Socio-Economic Monitoring Report 2021

MUROWA DIAMONDS

• Sustainability Report 2020

ARCTIC CANADIAN DIAMOND COMPANY

• Ekati Socio-Economic Monitoring Report 2021

FOOTNOTES

¹GIA (n.d.) Synthetic Diamonds: Improved Quality and Identification Challenges. Available at: https://www.gia.edu/gia-news-research-improved-quality-identification-challenges

²GIA (2017) A synthetic diamond overgrowth on a natural diamond. Available at:
https://www.gia.edu/gems-gemology/summer-2017-labnotes-synthetic-diamond-overgrowth-natural-diamond

³GIA (2019) Diamonds from the deep: How old are diamonds? Are they forever? Available at: https://www.gia.edu/gems-gemology/spring-2019-how-old-are-diamonds-are-they-forever

⁴GIA Diamonds from the Deep: How Old Are Diamonds? Are They Forever? (2019) https://www.gia.edu/gems-gemology/spring-2019-how-old-are-diamonds-are-they-forever

⁵Gemological Science International (2021) https://gemscience.net/geological-origin-of-natural-diamonds/

⁶GIA: HPHT and CVD Diamond Growth Processes (2016) https://www.gia.edu/hpht-and-cvd-diamond-growth-processes

⁷GIA: Observations on HPHT-grown synthetic diamonds: A review (2017) https://www.gia.edu/gems-gemology/fall-2017-observations-hpht-grown-synthetic-diamonds

⁸GIA (2019) CVD Layer grown on natural diamond. Available at: https://www.gia.edu/gems-gemology/spring-2019-labnotes-cvd-layer-grown-on-natural-diamond

⁹Kimberley Process Statistics (n.d.) Public statistics. Available at: https://kimberleyprocessstatistics.org/public_statistics

¹⁰Bain & Company (2021) The global diamond industry 2020 – 2021. Available at: https://www.bain.com/globalassets/noindex/2021/bain_report_diamond_report-2020-21.pdf

^11Ibid.

¹²IGI (2020) Some clarity on diamond clarity. Available at: https://www.igi.org/gemblog/some-clarity-on-diamond-clarity

¹³GIA (2014) Tiny inclusions reveal diamond age and earth’s history. Available at: https://www.gia.edu/UK-EN/gia-news-research-tiny-inclusions-reveal-diamond-age

¹⁴IGI (2023) Inclusions seen in Lab grown diamonds. Available at: https://www.igi.org/gemblog/inclusions-seen-in-lab-grown-diamonds/

¹⁵Ibid.

¹⁶GIA (n.d.) Synthetic diamonds: Improved quality and identification challenges. Available at: https://www.gia.edu/gia-news-research-improved-quality-identification-challenges

¹⁷Natural Diamond Council (n.d.) ASSURE Program. Available at: https://www.naturaldiamonds.com/assure

¹⁸Natural Diamond Council (n.d.) Diamond terminology. Available at: https://www.naturaldiamonds.com/resources/diamond-terminology/

¹⁹JVC Legal (n.d.) Understanding the FTC Guidelines. Available at: https://jvclegal.org/understanding-the-ftc-guidelines/

²⁰Professional Jewellery (2021) ASA rules jewellers must provide clarity on diamond origins. Available at: https://www.professionaljeweller.com/jewellers-must-provide-clarity-over-diamond-origins-rules-asa/

²¹ISO (n.d.) ISO 18323:2015 – Jewellery – Consumer confidence in the diamond industry. Available at: https://www.iso.org/standard/62163.html

²²CIBJO (n.d.) The blue books. Available at: https://www.cibjo.org/the-blue-books/

²³GIA (n.d.) Natural diamond grading sample report. Available at: https://www.gia.edu/analysis-grading-sample-report-diamond

²⁴GIA (n.d.) Grading sample report – Laboratory-grown diamond. Available at: https://www.gia.edu/analysis-grading-sample-report-laboratory-grown-diamond?reporttype=laboratory-grown-colored-diamond-report

²⁵GIA (n.d.) Natural diamond grading sample report. Available at: https://www.gia.edu/analysis-grading-sample-report-diamond

²⁶GIA (n.d.) Grading sample report – Laboratory-grown diamond. Available at: https://www.gia.edu/analysis-grading-sample-report-laboratory-grown-diamond?reporttype=laboratory-grown-colored-diamond-report

²⁷Carbon Trust (n.d.) What are Scope 3 emissions? Available at; https://www.carbontrust.com/our-work-and-impact/guides-reports-and-tools/briefing-what-are-scope-3-emissions

²⁸National Grid (n.d.) What are Scope 1, 2 and 3 emissions? Available at: https://www.nationalgrid.com/stories/energy-explained/what-are-scope-1-2-3-carbon-emissions#:~:text=Definitions%20of%20scope%201%2C%202,owned%20or%20controlled%20by%20it.

²⁹NASA (n.d.) Temperature of the sun. Available at: https://www.nasa.gov/sun

³⁰Our World In Data (n.d.) Electricity generation -2022, based on BP Statistical Review of World Energy. Available at: https://ourworldindata.org/grapher/electricity-generation

³¹Bain & Company (2021) The global diamond industry 2020 – 2021. Available at: https://www.bain.com/globalassets/noindex/2021/bain_report_diamond_report-2020-21.pdf

³²Our World In Data (n.d.) Electricity generation -2022, based on BP Statistical Review of World Energy. Available at: https://ourworldindata.org/grapher/electricity-generationWW

³³Allied Market Research (2022) Lab grown diamonds market. Available at: https://www.alliedmarketresearch.com/laboratory-grown-diamonds-market-A13694

³⁴Paul Zimnisky (2022) State of the diamond market Volume 6 Issue 4 – December 2022. Available at: https://www.paulzimnisky.com/state-of-the-diamond-market-past-issue-index

³⁵Bain & Company (2021) The global diamond industry 2020 – 2021. Available at: https://www.bain.com/globalassets/noindex/2021/bain_report_diamond_report-2020-21.pdf

³⁶GIA (2016) HPHT and CVD diamond growth processes. Available at: https://www.gia.edu/hpht-and-cvd-diamond-growth-processes

³⁷GIA (2017) Observations on HPHT-Grown Synthetic Diamonds: A Review. Available at: https://www.gia.edu/gems-gemology/fall-2017-observations-hpht-grown-synthetic-diamonds

³⁸Ibid.

³⁹NASA (n.d.) Temperature of the sun. Available at: https://www.nasa.gov/sun

⁴⁰Sphera (2021) Research based sustainability brief on laboratory-grown diamonds from chemical vapor deposition technology. Available at: https://pandoragroup.com/-/media/Files/Sustainability/Brilliance/Sphera-statement.pdf

⁴¹Ibid

⁴²Ibid

⁴³Vogue Business (2019) Are mined diamonds more environmentally friendly? Not so fast. Available at: https://www.voguebusiness.com/technology/mined-diamonds-environmentally-friendly-debeers-dpa

⁴⁴Diamond Council (2015) Discovery and mining. Available at: https://dcec.diamondcouncil.org/Documents/CourseMaterials/DiamondCourse/D_Lesson_11.pdf, BBC (2020) The sparkling rise of the lab grown diamond.

⁴⁵Building Green (n.d.) The urgency of embodied carbon. Available at: https://www.buildinggreen.com/feature/urgency-embodied-carbon-and-what-you-can-do-about-it#:~:text=Mithun%20(Meghan%20Lewis)-,Steel,ton%20of%20greenhouse%20gas%20emissions.

⁴⁶V. Zhdanov et al (2021) A Comparative Analysis of Energy and Water Consumption of Mined versus Synthetic Diamonds. Energies 2021, 14, 7062. https://doi.org/10.3390/en14217062

⁴⁷JCK Online (2023) No, laboratory-grown diamonds are not mining free. Available at: https://www.jckonline.com/editorial-article/laboratory-grown-diamonds-mining-free/

⁴⁸See Annex on page 48

⁴⁹V. Zhdanov et al (2021) A Comparative Analysis of Energy and Water Consumption of Mined versus Synthetic Diamonds. Energies 2021, 14, 7062. https://doi.org/10.3390/en14217062

⁵⁰FTC (2019) Warning letters regarding diamond ad disclosure. Available at: https://www.ftc.gov/news-events/news/press-releases/2019/04/ftc-sends-warning-letters-companies-regarding-diamond-ad-disclosures

⁵¹Guardian (2020) Are lab grown diamonds the more ethical choice to say I do? Available at: https://www.theguardian.com/lifeandstyle/2020/mar/10/diamonds-laboratory-grown-climate-change

⁵²UK Government (n.d.) Green claims code. Available at: https://greenclaims.campaign.gov.uk/

⁵³Responsible Investor (2021) France brings in fines against greenwashing. Available at: https://www.responsible-investor.com/france-brings-in-fines-against-greenwashing/

⁵⁴De Beers (2021) Sustainability report 2021. Available at: https://www.debeersgroup.com/~/media/Files/D/De-Beers-Group-V2/documents/building-forever/building-forever-our-2021-sustainability-report.pdf

⁵⁵Rio Tinto (2022) Climate change report. Available at: https://www.riotinto.com/en/invest/reports/climate-change-report

⁵⁶ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

⁵⁷ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

⁵⁸US Environmental Protection Agency (n.d.) Greenhouse Gas Equivalencies Calculator. Available at: https://www.epa.gov/energy/greenhouse-gas-equivalencies-calculator#results

⁵⁹De Beers (2021) Sustainability report 2021. Available at: https://www.debeersgroup.com/~/media/Files/D/De-Beers-Group-V2/documents/building-forever/building-forever-our-2021-sustainability-report.pdf

⁶⁰Rio Tinto (2022) Climate change report. Available at: https://www.riotinto.com/en/invest/reports/climate-change-report

⁶¹Ibid.

⁶²De Beers Canada via Youtube (2022) Chidliak project proposal. Available at: https://www.youtube.com/watch?v=41M30xpxL0M

⁶³McKinsey (n.d.) Creating the zero-carbon mine. Available at: https://www.mckinsey.com/industries/metals-and-mining/our-insights/creating-the-zero-carbon-mine

⁶⁴McKinsey (n.d.) Creating the zero-carbon mine. Available at: https://www.mckinsey.com/industries/metals-and-mining/our-insights/creating-the-zero-carbon-mine

⁶⁵Rio Tinto (n.d.) Our first solar plant to power new iron ore mine. Available at: https://www.riotinto.com/en/news/stories/First-solar-plant

⁶⁶Canadian Mining and Energy (2014) Diavik Diamond Mine powers up with wind. https://www.miningandenergy.ca/sustainability/article/diavik_diamond_mine_turns_to_wind/

⁶⁷Rio Tinto (n.d.) Diavik. Available at: https://www.riotinto.com/en/can/canada-operations/diavik

⁶⁸Anglo American (2022) Anglo American and EDF Renewables agree to renewable energy partnership in South Africa to form Envusa Energy. Available at: https://www.angloamerican.com/media/press-releases/2022/04-10-2022

⁶⁹De Beers Group (2021) Sustainability report 2021. Available at: https://www.debeersgroup.com/~/media/Files/D/De-Beers-Group-V2/documents/building-forever/building-forever-our-2021-sustainability-report.pdf

⁷⁰WEF (2022) Green steel. Available at: https://www.weforum.org/agenda/2022/07/green-steel-emissions-net-zero/

⁷¹McKinsey (n.d.) Creating the zero-carbon mine. Available at: https://www.mckinsey.com/industries/metals-and-mining/our-insights/creating-the-zero-carbon-mine

⁷²CDP (2022) 4 steps for reducing Scope 3 emissions. Available at: https://www.cdp.net/en/articles/supply-chain/4-steps-for-reducing-scope-3-emissions-and-accelerating-action-through-your-supply-chain

⁷³Kelp Blue (n.d.) Available at: https://kelp.blue/

⁷⁴De Beers Group (2021) Kelp Blue. Available at: https://www.debeersgroup.com/sustainability-and-ethics/protecting-the-natural-world/kelp-blue

⁷⁵Petra Diamonds (2022) Protecting our planet. https://www.petradiamonds.com/wp-content/uploads/Pages-63-81-of-SR.pdf

⁷⁶Wonderbag (n.d.) Carbon. Available at: https://www.wonderbagworld.com/carbon

⁷⁷De Beers Group (n.d.) CarbonVault. Available at: https://www.debeersgroup.com/sustainability-and-ethics/protecting-the-natural-world/carbon-vault

⁷⁸ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

⁷⁹Natural Diamond Council (2020) Creating a force for good to support artisanal miners. Available at: https://www.naturaldiamonds.com/industry-news/creating-a-force-for-good-to-support-artisanal-miners-2/

⁸⁰European Commission (n.d.) Artisanal and small-scale mining. Available at: https://rmis.jrc.ec.europa.eu/?page=artisanal-and-small-scale-mining-a6f8a3#:~:text=Artisanal%20and%20small%2Dscale%20mining%20(ASM)%20refers%20to%20mining,and%20requires%20low%20investment%20levels.

⁸¹ERM (2022) NDC Sword & Shield Library report. Internal research

⁸²ERM (2022) NDC Sword & Shield Library report. Internal research

⁸³Petra Diamonds (2022) Petra Diamonds Sustainability Report. Available at: https://www.petradiamonds.com/wp-content/uploads/Petra-Diamonds-Limited-Sustainability-Report-2022-1.pdf

⁸⁴Lucara Diamond (n.d.) Sustainability reports. Available at: https://lucaradiamond.com/sustainability/sustainability-reports/

⁸³Petra Diamonds (2022) Petra Diamonds Sustainability Report. Available at: https://www.petradiamonds.com/wp-content/uploads/Petra-Diamonds-Limited-Sustainability-Report-2022-1.pdf

⁸⁴Lucara Diamond (n.d.) Sustainability reports. Available at: https://lucaradiamond.com/sustainability/sustainability-reports/

⁸⁵ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

⁸⁶De Beers (2019) Our material topics progress. Available at: https://www.debeersgroup.com/~/media/Files/D/De-Beers-Group-V2/documents/building-forever/our-material-topics-progress-2019-report.pdf

⁸⁷Anglo American (n.d.) Sustainable mining plan. Available at: https://www.angloamerican.com/sustainable-mining-plan/healthy-environment

⁸⁸Petra Diamonds (2022) Petra Diamonds Sustainability Report. Available at: https://www.petradiamonds.com/wp-content/uploads/Petra-Diamonds-Limited-Sustainability-Report-2022-1.pdf

⁸⁹ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

⁹⁰De Beers Group (2021) Sustainability report 2021. Available at: https://www.debeersgroup.com/~/media/Files/D/De-Beers-Group-V2/documents/building-forever/building-forever-our-2021-sustainability-report.pdf

⁹¹De Beers Group (n.d.) The Diamond Route. Available at: https://www.debeersgroup.com/sustainability-and-ethics/protecting-the-natural-world/the-diamond-route

⁹²De Beers Group (n.d.) Moving giants. Available at: https://www.debeersgroup.com/sustainability-and-ethics/protecting-the-natural-world/moving-giants

¹⁰²Rio Tinto (n.d.) Innovation at Diavik. Available at: https://www.riotinto.com/en/operations/canada/diavik#:~:text=All%20mines%20have%20a%20finite,back%20into%20the%20open%20pit.

¹⁰³Rio Tinto (2021) Rio Tinto invests in start-up to support habitat restoration. Available at: https://www.riotinto.com/en/news/releases/2021/rio-tinto-invests-in-start-up-to-support-habitat-restoration-final

¹⁰⁴Life After Diamond Mining (n.d.) Process. Available at: https://lifeafterdiamondmining.com/process

¹⁰⁵Kimberley Process Statistics (n.d.) Public statistics. Available at: https://kimberleyprocessstatistics.org/public_statistics

¹⁰⁶Geology (n.d.) How do diamonds form? Available at: https://geology.com/articles/diamonds-from-coal/

¹⁰⁷Natural Diamond Council (2023) A brief history of natural diamonds. Available at: https://www.naturaldiamonds.com/epic-diamonds/history/the-diamond-story/

¹⁰⁸Natural Diamond Council (2021) Beyond the 4 C’s. Available at: https://www.naturaldiamondcouncil-academy.com/sites/default/files/2021-08/BEYONG%20THE%204C.pdf

¹⁰⁹Petra Diamonds (n.d.) Industry overview. Available at: https://www.petradiamonds.com/our-industry/industry-overview/

¹¹⁰De Beers Group (2014) The diamond insight report 2014. Available at: http://insightreport.debeersgroup.com/

¹¹¹Ibid

¹¹²Petra Diamonds (n.d.) Industry overview. Available at: https://www.petradiamonds.com/our-industry/industry-overview/

¹¹³Paul Zimnisky (2023) State of the diamond market February 2023. Available at: https://www.paulzimnisky.com/state-of-the-diamond-market-past-issue-index

¹¹⁴Petra Diamonds (n.d.) Industry overview. Available at: https://www.petradiamonds.com/our-industry/industry-overview/

¹¹⁵Ibid.

¹¹⁶ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

¹¹⁷JCK Online (2020) The Argyle diamond mine is shutting down. Available at: https://www.jckonline.com/editorial-article/argyle-diamond-mine-shutting/

¹¹⁸Paul Zimnisky (2023) State of the diamond market February 2023. Available at: https://www.paulzimnisky.com/state-of-the-diamond-market-past-issue-index

¹¹⁹De Beers Group (2022) De Beers group signs mineral investment contracts with Angola. Available at: https://www.debeersgroup.com/media/company-news/2022/de-beers-group-signs-mineral-investment-contracts-with-angola

¹²⁰Bain & Company (2022) The global diamond industry 2021 – 2022. Available at: https://www.bain.com/insights/a-brilliant-recovery-shapes-up-the-global-diamond-industry-2021-to-22

¹²¹The Israeli Diamond Industry (n.d.) Diamond sorting. Available at: https://en.israelidiamond.co.il/wikidiamond/terms-attributes-the-diamond/diamond-sorting/

¹²²Bain & Company (2022) The global diamond industry 2021 – 2022. Available at: https://www.bain.com/insights/a-brilliant-recovery-shapes-up-the-global-diamond-industry-2021-to-22

¹²³Kimberley Process Statistics (n.d.) Public statistics. Available at: https://kimberleyprocessstatistics.org/public_statistics

¹²⁴Ibid.

¹²⁵Bain & Company (2022) The global diamond industry 2021 – 2022. Available at: https://www.bain.com/insights/a-brilliant-recovery-shapes-up-the-global-diamond-industry-2021-to-22

¹²⁶De Beers Group (n.d.) Production reports. Available at: https://www.debeersgroup.com/reports/production-reports

¹²⁷GIA (n.d.) What are laboratory-grown diamonds. Available at: https://4cs.gia.edu/en-us/laboratory-grown-diamond/

¹²⁸IGS (n.d.) A brief history of laboratory-grown diamonds. Available at: https://www.gemsociety.org/article/brief-history-of-lab-grown-diamonds/

¹²⁹Bain & Company (2018) The global diamond industry. Available at: https://www.bain.com/contentassets/a53a9fa8bf5247a3b7bb0b10561510c2/bain_diamond_report_2018.pdf

¹³²The Gem Academy (2021) How much cheaper are laboratory-grown diamonds? Available at: https://www.thegemac.com/post/how-much-cheaper-are-laboratory-grown-diamonds

¹³³Ibid

¹³⁴Bain & Company (2019) The Global Diamond Industry 2019. Available at: https://www.bain.com/globalassets/noindex/2019/bain_report_global_diamond_report_2019.pdf

¹³⁵Bain & Company (2022) The global diamond industry 2021 – 2022. Available at: https://www.bain.com/insights/a-brilliant-recovery-shapes-up-the-global-diamond-industry-2021-to-22/

¹³⁶Ziminisky (n.d) Rough Diamond Index https://www.paulzimnisky.com/roughdiamondindex

¹³⁷OECD (2016) The challenges faced by developing countries in valuing rough diamonds. Available at: https://www.oecd.org/dev/Session-6B%20-Case-study-on-mineral-product-pricing-rough-diamonds.pdf

¹³⁸The Hindu Businessline (2023) What are laboratory-grown diamonds? Can they substitute natural diamonds? https://www.thehindubusinessline.com/blexplainer/bl-explainer-what-are-laboratory-grown-diamonds-can-they-substitute-natural-diamonds/article66476547.ece

¹³⁹Reuters (2017) De Beers Group Namibia launch world’s biggest diamond exploration ship. Available at: https://www.reuters.com/article/us-anglo-american-debeers-namibia-idUSKBN1961HS

¹⁴⁰Natural Diamond Council (2022) How buying sustainable natural diamonds leaves a positive impact. Available at: https://www.naturaldiamonds.com/diamond-guide/reasons-to-buy-sustainable-natural-diamonds/

¹⁴¹ ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

¹⁴²Ibid.

¹⁴³ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

¹⁴⁴Ibid.

¹⁴⁵The Sparklr (n.d.) Positive impact of diamonds on producing countries. Available at: https://www.thesparklr.com/learn/positive-impact-diamonds-producing-countries

¹⁴⁶PR Week (2022) Natural Diamond Council global ambassador Lily James visits Botswana. Available at: https://www.prnewswire.com/news-releases/natural-diamond-council-global-ambassador-lily-james-visits-botswana-301659963.html

¹⁴⁷Trucost (2019) The socio-economic and environmental impact of large-scale diamond mining. Available at: https://www.spglobal.com/marketintelligence/en/documents/the-socioeconomic-and-environmental-impact-of-large-scale-diamond-mining_dpa_02-may-2019.pdf

¹⁴⁸World Bank (n.d.) Small countries with volatile revenue: Botswana and Bhutan. Available at: https://documents1.worldbank.org/curated/en/413221467997599192/pdf/98089-WP-Small-states-with-volatile-revenue-flows-Box391504B-PUBLIC.pdf

¹⁴⁹Reuters (2023) De Beers Group confident talks will deliver Botswana diamond deal. Available at: https://www.reuters.com/markets/commodities/de-beers-confident-talks-will-deliver-botswana-diamond-deal-2023-02-16/

¹⁵⁰World Bank (n.d.) Small countries with volatile revenue: Botswana and Bhutan. Available at: https://documents1.worldbank.org/curated/en/413221467997599192/pdf/98089-WP-Small-states-with-volatile-revenue-flows-Box391504B-PUBLIC.pdf

¹⁵¹New York Times (2008) Diamonds are forever in Botswana. Available at: https://www.nytimes.com/2008/08/09/business/worldbusiness/09nocera.html

¹⁵²Reuters (2017) De Beers Group Namibia launch world’s biggest diamond exploration ship. Available at: https://www.reuters.com/article/us-anglo-american-debeers-namibia-idUSKBN1961HS

¹⁵³World Bank Group (2021) Namibia systematic country diagnostic. Available at: https://documents1.worldbank.org/curated/en/976371617896981427/pdf/Namibia-Systematic-Country-Diagnostics.pdf

¹⁵⁴Natural Diamond Council (2022) How the natural diamond industry supports Canada’s last frontier. Available at: https://www.naturaldiamonds.com/industry-insights/canada-diamond-mines-community-impact/

¹⁵⁵Ibid.

¹⁵⁶ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

¹⁵⁷Ibid.

¹⁵⁸Ibid.

¹⁵⁹Ibid.

¹⁶⁰De Beers Group (n.d.) Our journey – Volume 3. Available at: https://www.debeersgroup.com/~/media/Files/D/DeBeers-Group-V2/documents/building-forever/our-journey/our-journey-vol-3.pdf

¹⁶¹De Beers Group (n.d.) HIV & Aids prevention. Available at: https://www.debeersgroup.com/sustainability-and-ethics/partnering-for-thriving-communities/hiv-and-aids-prevention

¹⁶²The Sparklr (n.d.) Positive impact of diamonds on producing countries. Available at: https://www.thesparklr.com/learn/positive-impact-diamonds-producing-countries

¹⁶³Diamonds Do Good (n.d.) Who we help. Available at: https://www.diamondsdogood.com/who-we-help/

¹⁶⁴The Sparklr (n.d.) Positive impact of diamonds on producing countries. Available at: https://www.thesparklr.com/learn/positive-impact-diamonds-producing-countries

¹⁶⁵Resolve (n.d.) Diamond Development Initiatives. Available at: https://www.resolve.ngo/ddi.htm

¹⁶⁶Sedex (n.d.) What does ethically sourced mean? Available at: https://www.sedex.com/blog/what-does-ethically-sourced-mean/

¹⁶⁷Natural Diamond Council (n.d.) The framework for an ethical and sustainable diamond industry. Available at: https://www.naturaldiamonds.com/industry-insights/the-framework-for-an-ethical-and-sustainable-diamond-industry//

¹⁶⁸World Diamond Council (2022) System of Warranties Factsheet. Available at: https://www.worlddiamondcouncil.org/wp-content/uploads/2022/02/System-of-Warranties-Fact-Sheet.pdf

¹⁶⁹Responsible Jewellery Council (2019) Code of Practices. Available at: https://www.responsiblejewellery.com/wp-content/uploads/RJC-COP-December-2019.pdf

¹⁷⁰De Beers Group (n.d.) Best practice principles assurance program. Available at: https://https://www.debeersgroup.com/sustainability-and-ethics/leading-ethical-practices-across-the-industry/best-practice-principles-assurance-programme

¹⁷¹Kalahari Dream (n.d.) Available at: https://kalaharidream.com/

¹⁷²GemFair (n.d.) Available at: https://gemfair.com/

¹⁷³Mining Technology (2019) De Beers Group expands GemFair pilot for ethically sourced diamonds. Available at: https://www.mining-technology.com/news/company-news/de-beers-gemfair-diamonds/

¹⁷⁴Time (2015) How to buy an ethical diamond. Available at: https://time.com/4013735/how-to-buy-an-ethical-diamond/

¹⁷⁵ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

¹⁷⁶ILO (n.d.) Working conditions. Available at: https://www.ilo.org/global/topics/dw4sd/themes/working-conditions/lang–en/index.htm

¹⁷⁷ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

¹⁷⁸Responsible Jewellery (2017) Code of conduct. Available at: https://www.responsiblejewellery.com/wp-content/uploads/RJC-CoC-2017-V2-Standard-Guidance-3-1.pdf

¹⁷⁹Natural Diamond Council (2022) World health day: How the natural diamond industry is building healthy communities. Available at: https://www.naturaldiamonds.com/industry-insights/world-health-day-how-the-natural-diamond-industry-is-building-healthy-communities/

¹⁸⁰ERM (2022) Natural Diamond Council members sustainability overview. Internal research based on NDC members reports and audited data.

¹⁸¹Ibid.

¹⁸²OECD (n.d.) What big data can tell us about women on boards. Available at: https://www.oecd.org/gender/data/what-big-data-can-tell-us-about-women-on-boards.htm

¹⁸⁴Rio Tinto (2021) First female president appointed for Diavik Diamond Mine. Available at: https://www.riotinto.com/en/news/releases/2021/first-female-president-appointed-for-diavik-diamond-mine

¹⁸⁵Rio Tinto (n.d.) Executive committee. Available at: https://www.riotinto.com/en/about/executive-committee/kellie-parker

¹⁸⁶Lucara Diamond (2021) Sustainability report 2021. Available at: https://lucaradiamond.com/site/assets/files/39356/2021_sustainabilityreport.pdf

¹⁸⁷Kroll (2020) How due diligence can address risks in the diamond industry. https://www.kroll.com/en/insights/publications/compliance-risk/supply-chain-due-diligence-diamond-industry

¹⁸⁸Kroll (2020) How due diligence can address risks in the diamond industry. https://www.kroll.com/en/insights/publications/compliance-risk/supply-chain-due-diligence-diamond-industry

¹⁸⁹Bain & Company (2022) The global diamond industry 2021 – 2022. Available at: https://www.bain.com/insights/a-brilliant-recovery-shapes-up-the-global-diamond-industry-2021-to-22/

¹⁹⁰WEF (2018) From diamonds to recycling: how blockchain can drive responsible business rehttps://www.weforum.org/agenda/2018/06/diamonds-recycling-blockchain-technology-responsible-ethical-businesses/

¹⁹¹LCX (2022) Blockchain technology in diamond trading. Available at: https://www.lcx.com/blockchain-technology-in-diamond-trading/#:~:text=The%20blockchain%20can%20be%20used,they%20comply%20with%20all%20regulations.

¹⁹²De Beers Group (n.d.) Code of origin. Available at: https://www.debeersgroup.com/code-of-origin

¹⁹³De Beers (2023) GIA Joins Tracr. Available at: https://www.debeersgroup.com/media/company-news/2023/gia-joins-tracr

¹⁹⁴Sarine (2022) Enabling traceability, enhancing the supply chain. Available at: https://blog.sarine.com/enabling-traceability-enhancing-the-supply-chain

¹⁹⁵Ibid.

¹⁹⁶Wired (2017) How blockchain is stopping the spread of conflict diamonds. Available at: https://www.wired.co.uk/article/blockchain-conflict-diamonds-everledger

¹⁹⁷FT (2019) Transformations in the supply chain. Available at: https://www.ft.com/content/58642d44-d41c-11e9-8d46-8def889b4137

¹⁹⁸Barrons (2022) How this company is using blockchain to buff up the image of diamonds. Available at: https://www.barrons.com/articles/brilliant-earth-blockchain-diamonds-51647294829

¹⁹⁹WEF (2018)

²⁰⁰Responsible Jewellery Council (2019) Provision 14. Available at: https://www.responsiblejewellery.com/training/cop-2019-walkthrough/provision-14/

²⁰¹GIA (n.d.) Diamond origin. Available at: https://discover.gia.edu/diamond-origin.html

²⁰²The Week (2020) Tiffany & Co: Pioneering diamond traceability. Available at: https://www.theweek.co.uk/951538/tiffany-co-pioneering-diamond-traceability

²⁰³Professional Jeweller (2022) Cartier, Bulgari and more add latest development in diamond traceability. Available at: ttps://www.professionaljeweller.com/cartier-bulgari-and-more-add-latest-development-in-diamond-traceability/

Whether you’re a jewelry aficionado, a hopeful suitor, or just someone who loves a bit of bling, this chart is your map to understanding the lingo of the natural diamond world. Like the unique characteristics that a natural diamond possesses, this dictionary is a one-of-a-kind gem!

DIAMOND FACTS

Addressing Myths & Misconceptions About the Diamond Industry

Foreword

Natural Diamonds Have An Extraordinary Story to Tell.

Introduction

Key Findings

Is it possible to tell a laboratory-grown diamond from a natural diamond?

What tools are used to detect synthetic and natural diamonds?

Further industry assurance

How do I know whether I’m purchasing a natural or a laboratory-grown diamond?

Legal Definitions and Advertising Guidelines

Understanding grading reports and certifications

Understanding environmental terms

Are all laboratory-grown diamonds sustainable?

Background on scale and emissions footprint of laboratory-grown diamonds

The energy consumption of laboratory-grown diamonds

The carbon footprint of a 1 carat cut and polished laboratory-grown diamond

What about laboratory-grown diamonds’ social sustainability performance?

Accurate depiction of impact in carbon capture claims

Carbon Capture Claims

In one year, a mature tree will absorb on average more than 48 pounds of CO2 from the atmosphere (and release oxygen in exchange!). This is the equivalent of carbon locked in close to 30,000 carats of laboratory-grown diamonds.50

What is the natural diamond industry doing to reduce its carbon footprint and protect biodiversity?

Factors that influence the difference in carbon emissions recorded by the industry

How is the natural diamond industry working to decarbonize?

Reducing impact through carbon absorption, offsetting and conservation projects

What is the natural diamond industry doing to protect biodiversity?

What is the industry doing about the waste from mining?

Mine Closure: impact, regulations and planning

Responsible mine closure

Are natural diamonds rare?

Is the industry stockpiling diamonds to drive-up prices?

The factors impacting diamond inventories

Recent trends

What have been the price trends for laboratory-grown diamonds?

How has the pricing of laboratory-grown diamonds changed over time?

How the prices of natural diamonds and laboratory-grown diamonds have changed from 2016 – 2023

The current pricing of natural diamonds

The differences in pricing structures between laboratory-grown diamonds and natural diamonds

Do natural diamonds benefit the countries where they come from?

Enriching the lives of diamond mining communities

The impact of contributions from Natural Diamond Council members

How are natural diamonds ethically sourced?

Industry standards

What to consider when purchasing ethically sourced diamonds

What are the working conditions like in the natural diamond industry?

Employment benefits created by NDC members182

Health and safety

Gender diversity in the workplace

Are natural diamonds traceable?

The mine-to-market supply chain

This is only the beginning.

Annexes

Annex I

Annex II

Glossary

Natural Diamond Council Members Sustainability Reports

Diamond Dictionary: A-Z Guide to Natural Diamonds

Natural Diamonds Have An
Extraordinary Story to Tell.

Is it possible to tell a laboratory-grown
diamond from a natural diamond?

How do I know whether I’m purchasing a
natural or a laboratory-grown diamond?

Are all laboratory-grown
diamonds sustainable?

Background on scale and emissions footprint
of laboratory-grown diamonds

In one year, a mature tree will absorb on average more than 48 pounds of CO2 from the atmosphere (and release oxygen in exchange!). This is the equivalent of carbon locked in close to 30,000 carats of laboratory-grown diamonds.⁵⁰

What is the natural diamond industry
doing to reduce its carbon footprint
and protect biodiversity?

Is the industry stockpiling
diamonds to drive-up prices?

What have been the price trends for
laboratory-grown diamonds?

Do natural diamonds benefit the
countries where they come from?

How are natural diamonds
ethically sourced?

What are the working conditions like
in the natural diamond industry?

Employment benefits created by NDC members¹⁸²

Natural Diamond Council Members
Sustainability Reports