One of the World's Largest Independent Grading and Accreditation Services Providers

IGII employs a global workforce of experts and educators dedicated to industry service and consumer protection.

Verify Your Report

IGII’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.
Coloured Stone Report

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

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Jewelry Report

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

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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.

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IGII Education

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

Available Courses

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IGII eLearning

Learn anytime, anywhere with IGII eLearning & online webinars

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

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Consumer Education

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

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

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Jewelry Report

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

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Diamond Reports

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

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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.

Behind the scenes, Consumer Education, For Consumers, For Professionals, Gem Blog, Opinion

Joe Montaze: From Litigator to Jeweler
22 May 2025

Consumer Education, For Consumers, For Professionals, GemBlog, IGI Worldwide, Lab Grown Diamonds

The Evolution and Impact of Lab-Grown Diamonds: A Comparative Study of the Last Five Years
10 May 2025

Consumer Education, For Consumers, For Professionals, GemBlog, IGI Classroom, IGI Worldwide, News, Opinion

All About Colored Stones: Marcasite
3 May 2025

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One of the World's Largest Independent Grading and Accreditation Services Providers

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One of the World's Largest Independent Certification and Accreditation Services Provider