Gemlogis Belize

Gemlogis Belize

Gemlogis BELIZE is a portable diamond verification instrument for loose and mounted stones designed to separate natural diamonds from synthetic diamonds and diamond simulants with its double probe tip testing method.

The performance metrics shown below are based on testing done in 2020 using the ASSURE 1.0 test standard and sample sets. The Gemlogis BELIZE has not been tested under ASSURE 2.0.

Stone Testing Capability

Weight: 0.02 ct+
Size: 1.50 mm +
Colour: D-J
Shape: All
Diamond Simulants: Yes
Mounted Stones: Yes (not yet ASSURE Tested)

Instrument Performance

The below results demonstrate the performance of the Gemlogis Belize with the ASSURE 1.0 Core Sample by a Novice Operator:

Diamond False Positive Rate (optimal rate 0%): 0%
Diamond Referral Rate (optimal rate 0%): 6.9%
Diamond Accuracy Rate (optimal rate 100%): 92.3%
Speed (stones tested per hour): 195 

The ASSURE 1.0 Core Sample consists of 1,000 loose diamonds, 200 loose synthetic diamonds and 200 loose diamond simulants. The stones are 0.02ct to 0.20ct in D-J colour.

Instrument Capabilities

Automated Feed: No
Automated Results: Yes
Automated Dispense: No
Detect or Refer (Synthetic Diamonds): Detect
Detect or Refer (Diamond Simulants): Detect
Multiple Stones at Once: No
Training Required: No


The user depresses the probe tip 90 degree perpendicular to the table of the gemstone to start the testing. The instrument indicates Simulant if the test specimen is not a moissanite, diamond or synthetic diamond. Alternatively, it will prompt the user to ‘perform test II’ when the specimen is a moissanite, diamond or synthetic diamond.

The instrument makes a measurement and displays one of the following results:

  1. Simulant
  2. Moissanite
  3. Diamond (Earth-Mined)
  4. Type IIa /HPHT/CVD
  5. Metal

Instrument Specifications

Size: 4.8 cm (W) x 18.1 cm (D) x 2.4 cm (H)
Weight: 0.12 kg
Price: 999 USD (March 2021)

Contact information 
+852 2351 7888

ASSURE Tested December 2020
ASSURE ID: 08516