Jaipur, India —August 18, 2026 — Gemological Science International (GSI), one of the world's largest gemological organizations, has begun issuing colored stone reports carrying recognized color trade names — Pigeon Blood for ruby, Royal Blue and Padparadscha for sapphire — in Jaipur and Mumbai. It is...
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.
