GIA is the world’s most trusted name in diamond grading and gem identification. With objectivity and expertise as its hallmarks, GIA ensures the integrity and accuracy of every report it issues. GIA ...

GIA developed the industry standards for grading diamonds — carat, cut, clarity and color — known as the four Cs. GIA has 11 laboratories around the world providing the diamond grading and ...

“GIA Diamond Grading Reports are based on rigorous examination by trained and experienced professionals who use scientific and impartial assessment of the diamond’s four C’s ...

focuses on research, detecting treatments on stones, and providing reports on diamonds, colored gemstones and pearls, so dealers, buyers and consumers know the quality of their stones. GIA developed ...

Gamia is a Web3 gaming experience, blending a rich array of games with play-to-earn opportunities, all centered around the $GIA token. GIA ecosystem rewards gamers ...

The data displayed for this chart goes back to 1997, however we hope to be able to offer deeper historic information at a future point ...

This selection of gems from Ouro Prêto, Brazil, and Russia's Ural Mountains, displays the golden orange to pinkish red color range of precious topaz. The gems range from 7.61 to 14.33 carats in size.