Located near the jewellery hub of Camac Street, the lab is strategically poised to provide jewellery manufacturers, traders and retailers with GSI‘s world renowned services in their city Kolkata, 23 September, 2025: Gemological Science International (GSI) proudly announced the official launch...
By Ramit Kapur Managing Director, GSI India THE ART OF JEWELLERY
Mumbai, 27th November, 2014 - Gemological Science International (GSI) a full-service, high-tech lab designed specifically to meet the rapidly changing needs of the jewelry industry, participates at the Kerala Gems and Jewellery Show (KGJS), 2014. At this premier industry platform,...
Gemological Science International, headquartered in New York’s Diamond District, announced today that it has opened an office in Mumbai, India. The lab is fully owned by GSI and is located in the Opera House area. “We’ve been working in Mumbai for...
Gemological Science International (GSI), headquartered in New York, operates 13 laboratories strategically located in major global hubs for diamond and gemstone manufacturing and trade, including the United States, India, Hong Kong, Dubai, and Thailand.
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.
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.
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.
Every GSI grading report is available on our website. Please visit gemscience.net 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.
