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Assure Directory

GV5000 by China National Gemstone Testing Center (NGTC)/Nanjing Baoguang Testing Technology Company

Instrument Description

GV5000 is a desktop diamond verification instrument for loose and mounted stones. GV5000 is designed to separate diamonds from synthetic diamonds and diamond simulants. GV5000 is manually operated and requires an operator to interpret the test results. GV5000 is suitable for an environment where you need to test both mounted and loose diamonds e.g. dealers, diamond and jewellery manufacturers, retailers, buyers and gemmological laboratories. ASSURE ID: 637294.

 

Instrument Specs

Size: 50 cm (W) x 25 cm (D) x 61 cm (H)

Weight: 17 kg

Price: 43,200 USD (February 2019)

View Instrument Details

What Stones Can Be Tested?

Weight of stones: 0.002 ct-20 ct

Size of stones: 0.7 mm-20 mm

Colour of stones: D-N

Shape of stones: All

Diamond simulants: Yes

Jewellery: Yes

 

Capabilities according to China National Gemstone Testing Center (NGTC)/Nanjing Baoguang Testing Technology Company

Instrument Functionality

Automatically feed the stones? No

Automatically interpret the results? No

Automatically dispense the stones? No

Detect or refer synthetic diamonds? Detect

Detect or refer diamond simulants? Detect

Multiple stones at one time? Yes

Training? Yes, review user manual

How Does it Operate?

The user manually places the loose or mounted stones onto a tray that is placed inside the instrument. To start the testing, the user closes the test chamber and starts the testing software. GV5000 captures multiple images and based on visual analysis of the images, and support from a decision tool, the operator concludes the nature of the stones.

 

The following results can be concluded by the operator based on the data generated by the GV5000:

 

  1. ‘Diamond’
  2. ‘Synthetic diamond’
  3. ‘Diamond simulant’
  4. ‘Refer’

 

The ‘Refer’ result could contain potential synthetic diamonds and diamonds. These referrals shall be tested further for full verification.National Gemstone Testing Center (NGTC)/Nanjing Baoguang Testing Technology Company recommends further testing by a gemmological laboratory.

 

GV5000 need to be recalibrated before usage or after it has been moved.

 

ASSURE Test

GV5000 was tested in accordance with the Diamond Verification Instrument Standard with the test protocol for instruments that separate diamonds, synthetic diamonds and diamond simulants (Operation Category 3).

 

The tests took place at the independent laboratory UL in Canton, Massachusetts, United States. GV5000 requires manual interpretation and the instrument was tested both with a novice and a manufacturer appointed expert. The manufacturer appointed an expert from UL’s team. The below results are from the expert tests. Both the novice and the expert test results can be found in the summary report issued by UL. GV5000 was tested with the ASSURE Core Sample and the ASSURE Smalls Sample.

 

The UL test report including more detailed test results can be found here.

 


ASSURE Core Sample

The ASSURE Core Sample consists of 1,000 diamonds, 200 synthetic diamonds and 200 diamond simulants. The stones are 0.02 ct to 0.20 ct in D-J colour. The below results are from the test with the ASSURE Core Sample.

 

Diamond False Positive Rate Ratio of synthetic diamonds (and diamond simulants) incorrectly classified as 'diamond' to the total number of synthetic diamonds (and diamond simulants) 1%
Diamond Referral Rate Ratio of diamonds being referred for further testing to the total number of diamonds n/a
Diamond Accuracy Ratio of diamonds correctly classified as diamonds to the total number of diamonds 98.5%
Synthetic Diamond Referral Rate Ratio of synthetic diamonds being referred for further testing to the total number of synthetic diamonds n/a
Speed Stones tested per hour 296
ASSURE Smalls Sample

The ASSURE Smalls Sample consists of 1,000 diamonds, 200 synthetic diamonds and 200 diamond simulants. The stones are 0.005 ct to 0.02 ct in D-J colour. The below results are from the test with the ASSURE Smalls Sample.

 

Diamond False Positive Rate Ratio of synthetic diamonds and diamond simulants incorrectly classified as 'diamond' to the total number of synthetic diamonds and diamond simulants 0.3%
Diamond Referral Rate Ratio of diamonds being referred for further testing to the total number of diamonds n/a
Diamond Accuracy Ratio of diamonds correctly classified as 'diamond' to the total number of diamonds 97.5%
Synthetic Diamond Referral Rate Ratio of synthetic diamonds being referred for further testing to the total number of synthetic diamonds n/a
Speed Stones tested per hour 296
Where Do I purchase the Instrument?

Website: http://www.bgyq.cn/

Email: sale@bgyq.cn

Phone: +86 25 84803536

Safety Testing

The most important requirement when selecting a Diamond Verification Instrument is that the instrument meets the safety regulations of your local jurisdiction. Before purchasing an instrument, request that the manufacturer verifies that their instrument complies with all regulatory requirements.

 

Click here to download the safety testing credential for GV5000 submitted byNational Gemstone Testing Center (NGTC)/Nanjing Baoguang Testing Technology Company. Please note that the safety testing credentials have not been validated through the ASSURE Program.