Gemstone 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.

Colored Stone Report

The IGI 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.

Colored Stone Report

Identification Reports

IGI Identification Reports are issued for pieces mixing natural gemstones with non-natural stones, or featuring pearls, lab created colored stones, simulants or other materials.

Identification Reports

Consumer Education

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

All Resources

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

Diamond Shapes

Diamonds come in a wide range of stunning shapes, from the classic round brilliant to the regal emerald cut, each possessing its own unique charm and elegance.

Diamond Shapes

Enroll in our Diamond Graduate programs

IGI’s School of Gemology is the ultimate place to discover the breathtaking world of diamonds, gemstones and jewelry.