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

With 10 laboratories and 3 schools in 5countries, GGIL employs a global workforce of experts and educators dedicated to industry service and consumer protection.

GGIL’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.

GGIL reports

GGIL 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.

GGIL 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.

Our Available Services

The GGIL Colored Stone Report

Identifies a natural colored gemstone’s species and variety. A detailed photograph is included, and the country of origin will be stated if gemological analysis conclusively reveals it.

Jewelry Report

IGI Jewelry Reports are issued for pieces featuring natural and lab grown diamonds and gemstones. Each report provides all gemstone and mounting specifics, and clear standardized photos showing craftsmanship details that may not otherwise be visible.

Diamond Reports

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