The World’s Largest Gemological Institute

With 30 laboratories and 19 schools in 10 countries, IGI has a workforce of over 1,000 experts dedicated to industry service and consumer protection.

Verify Your Diamond

IGI’s supreme position in the gemological world is no coincidence. It is the result of continuous research, support and synergy with professionals and consumers alike.

 

IGI reports

IGI grading reports play an essential role in the global diamond, gem and jewelry market, serving as the common language of trust and confidence in the gemological world.

All Reports

Diamond Reports

IGI’s loose diamond reports clearly identify natural or lab grown origin and document all aspects of the diamond’s value-setting 4Cs.

Diamond Reports

Jewelry Report

IGI pioneered grading reports for finished jewelry, providing peace of mind for millions of consumers who purchase jewelry every day.

Jewelry Report

Colored Stone Report

IGI analyzes every gemstone to identify species and variety, provide detailed information and disclose any treatments that may be present.

Colored Stone Report

IGI Education

Offering more courses in more locations around the world, IGI’s schools of gemology are unrivaled in diversity and reach, offered in-person and online via customizable webinars and eLearning programs.

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 eLearning

Learn anytime, anywhere with IGI eLearning & online webinars

Experience the convenience and flexibility of online learning with IGI eLearning platform’s top-quality courses and online webinars.

Consumer Education

IGI consumer education is designed to prepare shoppers to make informed decisions when buying or selling diamonds, gemstones and jewelry.

Go To School

The 4Cs

Learn about Cut, Clarity, Color and Carat weight and the international grading system that determines the quality and price of a diamond.

The 4Cs

Lab Grown Diamonds

See how laboratory grown diamonds are physically, optically and chemically identical to natural diamonds which formed in the earth.

Lab Grown Diamonds

Colored Gemstones

From rubies, sapphires and emeralds to the birthstones and beyond, explore the world of color in our colored gemstone tutorial.

Colored Gemstones

Explore the IGI GemBlog

Composed by IGI experts and prominent guest authors, our cutting edge content is perfect for sharing with family and friends who appreciate gemology, science, history, and entertainment.

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