Year: 2020

GSI Diamond Certification-usa
GSI Education 01 (1) (2)

GSI Launches First Ever Lab Grown Diamond Course for the Industry

NEW YORK – October 20, 2020 – Gemological Science International (GSI), one of the largest gemological organizations in the world, announces the launch of its new online education course: Laboratory-Grown Diamond Essentials – the industry’s first-ever educational course dedicated to laboratory-grown diamonds....

Read more

GSI Appoints Alethea Inns as Chief Learning Officer

GSI, New York – Gemological Science International (GSI) has appointed Alethea Inns as its Chief Learning Officer. The new role is part of GSI’s commitment to ongoing education programs, courses, and tools for the trade and consumers.  As a seasoned...

Read more
RAMAN Scattering: Fingerprint for Identification of nature and color origin of pearls

RAMAN Scattering: Fingerprint For Identification of Nature and Color Origin of Pearls – Study by Seema Athavale- Chief Gemologist, GSI

Seema Athavale, Chief Gemologist, serving in Research & Development capacity with GSI contributed to an article in International Research Journal of Engineering and Technology on RAMAN Scattering: Fingerprint for Identification of nature and color origin of pearls Considering Pearl to...

Read more
Media Appearance_26-02 Final

Gemological Science International (GSI) President and Co-Founder, Debbie Azar, Appeared on Six Broadcast Interviews for Valentine’s Day 2020

(NEW YORK – February 24, 2020) –  Debbie Azar, President and Co-Founder of Gemological Science International (GSI), was interviewed on six major broadcast outlets where she was invited to speak as an industry expert in the lead-up to Valentine’s Day...

Read more
Nasadaq Resize 2


GSI President & Co-Founder Debbie Azar spoke with "Trade Talks" host Jill Malandrino of Nasdaq on Valentine’s Day about consumer spending, sustainability and all the latest jewelry trends. Love modeling all the bling with Jill Malandrino – looking forward to next time! Watch the...

Read more


Where is Gemological Science International (GSI) located?

GSI is headquartered in New York, NY. It has 13 laboratories on four continents and in a number of countries: the United States, India, Dubai, Israel, Belgium, Hong Kong, and Botswana. This makes GSI one of the largest independent gemological organizations in the world.

Is there a difference between grading reports issued by different GSI laboratories?

All GSI laboratories grade using the same methods and adhere to the same standards. Every laboratory is staffed with highly trained professionals who have years of grading experience and an extensive gemological background.

What does it mean when a sales associate tells me my diamond is “GSI Certified” or is accompanied by a “GSI Certificate”?

The phrases “GSI Certificate” and “GSI Certified” are industry shorthand for GSI grading or identification reports. What this means to you is that expert gemologists and trained professionals meticulously evaluated the item. When your diamond, jewelry or gemstone is accompanied by a GSI grading report, you can be completely confident in the accuracy and objectivity of the evaluation.

Where can I find “GSI Certified Diamonds”?

GSI diamond grading and identification reports can be found in jewelry stores worldwide and online. Insist on a GSI grading report when shopping for a diamond, jewelry or gemstone.

What do I do if I lose my GSI Diamond Report?

Every GSI grading report is available on our website. Please visit and go to “verify your report”. Enter your GSI report number and you’ll instantly have access to a digital copy of it. You can also email us through the website to request a copy.

Select your currency