Gemlogis Lumens is a desktop diamond verification instrument for loose and mounted stones designed to separate natural diamonds from synthetic diamonds and cubic zirconia. The Lumens is manually operated but gives an automatic result.
Weight: 0.002 ct+
Size: 1 mm +
Colour: D-J
Shape: All
Diamond Simulants: Cubic Zirconia
Mounted Stones: Yes (open back setting)
Key performance metrics measured for the Lumens with the ASSURE 2.0 Primary Loose Stone Sample:
Diamond False Positive Rate (optimal rate 0%): 4.7%
Diamond Referral Rate (optimal rate 0%): n/a
Diamond Accuracy Rate (optimal rate 100%): 98.4%
The Primary Loose Stone Sample was tested three times and consists of 350 loose diamonds and 100 loose synthetic diamonds. The stones are 0.03 ct to 0.20 ct in D-J colour.
Key performance metrics measured for the Lumens with the ASSURE 2.0 Smalls Loose Stone Sample:
Diamond False Positive Rate (optimal rate 0%): 5.7%
Diamond Referral Rate (optimal rate 0%): n/a
Diamond Accuracy Rate (optimal rate 100%): 97.0%
The Smalls Loose Stone Sample was tested three times and consists of 350 loose diamonds and 100 loose synthetic diamonds. The stones are 0.005 ct to 0.02 ct in D-J colour.
The measured test speed for the Lumens was 199 stones per hour.
Key performance metrics measured for the Lumens with the ASSURE 2.0 Primary Mounted Stone Sample:
Diamond False Positive Rate (optimal rate 0%): 2.2%
Diamond Referral Rate (optimal rate 0%): n/a
Diamond Accuracy Rate (optimal rate 100%): 100.0%
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.
Automated Feed: No
Automated Results: Yes
Automated Dispense: No
Detect or Refer (Synthetic Diamonds): Detect
Detect or Refer (Diamond Simulants): N/A (not tested as only capable of screening Cubic Zirconia)
Multiple Stones at Once: Yes
Training Required: No
The Lumens can screen multiple loose or mounted stones at a time arranged on trays, and can return the following results:
For ASSURE testing, CVD and HPHT results were categorized as Synthetic for calculation the performance metrics. Simulants were not included in the ASSURE test sample since the Lumens does not screen Moissanite, Sapphire or glass simulants.
Size: 29 cm (W) x 30.6 cm (D) x 31.4 cm (H)
Weight: 9.6 kg
Price: 4,500 USD (March 2025)
gemlogis.com
support@jubileediamond.com.hk
+852 2351 7888
