GSI - Gemstone Identification - Grading - Appraisal Services

Gemological Science International (GSI) has re-engineered the processing paths for gem identification and grading. Our unique GSI gem identification and grading methods have made our process incredibly efficient while maintaining the accuracy and integrity of our results, allowing us to offer a world-class product at an affordable price.

GSI provides reliable, fast, and professional gemstone identification as well as grading and appraisal services to the global fine jewelry industry. GSI is the only major gemological laboratory established in the 21st century. Within a relatively short period of time, GSI has grown to become one of the largest gem labs in the world.

GSI’s Vision

We believe that all diamond buyers deserve the peace of mind afforded by a reliable grading report. That’s why GSI strives to deliver results you can trust at a price you can afford.

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