The Sherlock Holmes 4.0 is a portable desktop diamond verification instrument for loose and mounted stones designed to separate diamonds from synthetic diamonds. The operator must install Yehuda app and calibrate a recent model smart phone (not included) before using the device. The Sherlock Holmes 4.0 is manually operated and requires operator interpret the test results.
Weight: All
Size: All
Colour: D-K
Shape: All
Diamond Simulants: No
Mounted Stones: Yes
Key performance metrics measured for the Sherlock Holmes 4.0 with the ASSURE 2.0 Primary Loose Stone Sample:
Diamond False Positive Rate (optimal rate 0%): 0%
Diamond Referral Rate (optimal rate 0%): N/A
Diamond Accuracy Rate (optimal rate 100%): 97.2%
The Primary Loose Stone Sample was tested three times and consists of 350 loose diamonds, 100 loose synthetic diamonds and 50 loose diamond simulants. The stones are 0.03 ct to 0.20 ct in D-J colour.
Key performance metrics measured for the Sherlock Holmes 4.0 with the ASSURE 2.0 Smalls Loose Stone Sample:
Diamond False Positive Rate (optimal rate 0%): 0%
Diamond Referral Rate (optimal rate 0%): N/A
Diamond Accuracy Rate (optimal rate 100%): 92.6%
The Smalls Loose Stone Sample was tested three times and consists of 350 loose diamonds, 100 loose synthetic diamonds and 50 loose diamond simulants. The stones are 0.005 ct to 0.02 ct in D-J colour.
The measured test speed for the Sherlock Holmes 4.0 was 109 stones per hour.
Key performance metrics measured for the Sherlock Holmes 4.0 with the ASSURE 2.0 Primary Mounted Stone Sample:
Diamond False Positive Rate (optimal rate 0%): 0%
Diamond Referral Rate (optimal rate 0%): N/A
Diamond Accuracy Rate (optimal rate 100%): 100%
The Primary Mounted Stone Sample consists of jewelry pieces with open-back settings containing a total of 303 stones. The stones are a mix of diamonds, laboratory grown diamonds and diamond simulants in the D-J colour range and have a minimum girdle diameter of 2.0 mm.
Key performance metrics measured for the Sherlock Holmes 4.0 with the ASSURE 2.0 Smalls Mounted Stone Sample:
Diamond False Positive Rate (optimal rate 0%): 0%
Diamond Referral Rate (optimal rate 0%): N/A
Diamond Accuracy Rate (optimal rate 100%): 100%
The Smalls Mounted Stone Sample consists of jewelry pieces with closed-back settings containing a total of 54 stones. The stones are a mix of diamonds, laboratory grown diamonds and diamond simulants in the D-J colour range and have a girdle diameter between 1.0 mm and 2.0 mm.
Automated Feed: No
Automated Results: No
Automated Dispense: No
Detect or Refer (Synthetic Diamonds): Detect
Detect or Refer (Diamond Simulants): N/A
Multiple Stones at Once: Yes
Training Required: No
The Sherlock Holmes Detector 4.0 requires visual interpretation of long UV fluorescence, phosphorescence and fluorescence images. In some cases it is necessary to view stone from multiple angles at maximum zoom to assist with interpretation. The operator can conclude one of the following results:
i) Diamond
ii) Synthetic Diamond
There is no Referral category for this device; some diamonds may be categorized as Synthetic Diamond. The operator must supply their own recent model smartphone* (<3 yrs old) with iOS or Android and installed Yehuda app. Prior to testing, the phone must be color calibrated using a selection of sample stones of known origin (not included with device).
* iPhone 15 with iOS 17.2 was used for ASSURE testing.
Size: 15 cm (W) x 21 cm (D) x 14 cm (H)
Weight: 3.7 kg
Price: 6,745 USD + $10/mth subscription (Sept 2024)
1 800 934 8320
ASSURE Tested August 2024
