Instrument Performance
Key performance metrics measured for the EXA with the ASSURE 2.0 Primary Loose Stone Sample:
Diamond False Positive Rate (optimal rate 0%): 0%
Diamond Referral Rate (optimal rate 0%): 5.5%
Diamond Accuracy Rate (optimal rate 100%): 94.5%
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 EXA with the ASSURE 2.0 Smalls Loose Stone Sample:
Diamond False Positive Rate (optimal rate 0%): 0%
Diamond Referral Rate (optimal rate 0%): 1o.1%
Diamond Accuracy Rate (optimal rate 100%): 89.9%
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 EXA was 205 stones per hour.
Key performance metrics measured for the EXA with the ASSURE 2.0 Primary Mounted Stone Sample:
Diamond False Positive Rate (optimal rate 0%): 0%
Diamond Referral Rate (optimal rate 0%): 10.2%
Diamond Accuracy Rate (optimal rate 100%): 89.8%
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.