GSI Diamond Certification-usa

10 Questions with GSI President Debbie Azar – Interview by National Jeweler

Debbie Azar shares her thoughts on the future of diamond detection, screening melee today, “bad actors,” and more. By National Jeweler - In this 10-question Q&A, Debbie Azar, president of Gemological Science International, answers questions about lab-grown diamonds, the...

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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...

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GSI the First Diamond Grading Institute to bring International Standards to India participates in the 2nd edition of DDES

Gemological Science International (GSI) one of the world's largest gemological organizations participates in the 2nd edition of DDES (Diamond Detection Expo & Symposium) - a two-day event which aims to provide a platform for companies offering machines, expertise& equipment for...

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Mark Gershburg, CEO of GSI

Synthetic Diamonds: Better Understanding Will Calm Confusion, Says GSI’s Mark Gershburg

[lwptoc] Synthetic Diamonds: Better Understanding Will Calm Confusion, Says GSI’s Mark Gershburg “A better understanding of the facts and issues surrounding synthetic diamonds will help dispel some of the needless panic and confusion. It will help the diamond industry cope...

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GSI and MJDMA Conduct Free Seminar for the Trade in Chennai

[lwptoc] October 2015 – GSI (Gemological Science International), one of the world’s largest gem labs and MJDMA (The Madras Jewellers & Diamond Merchants' Association) hosted a free seminar at Chennai on “Indian Gem & Jewelry Industry – Issues and Solutions”...

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GSI, Gemological Science International, an independent gemological laboratory, presented the fabulous collection of couture designer Anand Shah called “The Garden of Eden” at India International Jewellery Week 2015. The Gemological Science International was established 10 years ago and is one...

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GSI Conducts Spectrum Seminar at IIJS 2015

GSI (Gemological Science International), one of the world’s largest Gemological laboratories and sponsor for the Spectrum Seminar Series, a four-day education series at the IIJS 2015, invites IIJS participants and visitors for their “The Bench Workshop on Inclusions in Natural...

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GSI Proudly Supports Anand Shah at IIJW

GSI (Gemological Science International) is proud to support and sponsor incredible jewelry designer Mr. Anand Shah at IIJW 2015. Anand will showcase distinctive pieces displaying his intimacy with his muse, Mother Nature, and interprets it in its entire wild splendor...

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GSI Botswana – The First to Utilize Sarine Axiom in Africa

Botswana, February 2015 – Gemological Science International (GSI), one of the largest independently owned gemological laboratories in the world, is pleased to announce that its Botswana laboratory is the first in Africa to use DiaMension™ Axiom in Africa. DiaMension™ Axiom...

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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.

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