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Showing posts with label Diamond Grading. Show all posts
Showing posts with label Diamond Grading. Show all posts

Monday, June 26, 2023

HPHT-Grown Colorless Diamond Displaying Unusual Phosphorescence Effects

Phosphorescence produced from visible light by diamonds will always remain a challenge for diamond graders. Many thanks to Gems & Gemology and GIA researchers for sharing an insightful report for practicing gemologists and consumers.


Useful link:

Wednesday, September 23, 2020

ISO 24016:2020

CIBJO has described the publication by the International Standards Organisation of ISO 24016, the first-ever standards approved by the body that specifies the terminology, classification and the methods to be used for the grading and description of single unmounted polished diamonds.


Useful links: http://www.cibjo.org I https://www.iso.org/standards

Tuesday, August 04, 2020

AGS Lab To Resume Grading Lab-Grown Diamonds

American Gem Society's grading laboratory will again evaluate laboratory-grown diamonds, a service it began in 2012 and then stopped in 2013 due to a lack of business. For the moment, they will be available only in digital form on the lab's Only My Diamond platform.


Useful link:
https://www.americangemsociety.org

Sunday, July 14, 2019

Saturday, July 06, 2019

Varna-D

Gemoro Products announced that it will be the worldwide distributor for Imagem’s new Varna-D polished diamond grading device. 

The portable state-of-the-art device is designed to quickly and reliably color-grade polished diamonds from D to L, the company said. 

It can be used on diamonds of various sizes (0.25 carats to 5 carats), shapes, fluorescence, zoning and secondary hues, and has a rechargeable battery that lasts for five-plus hours.

The device is priced at $5,999. For more information, visit ImagemInc.com.