Analyses and separates diamonds from simulants, laboratory-grown and potentially HPHT treated natural diamonds.
Illustrate your way to a promising future. Learn how to take your great ideas and illustrate them just like professional designers.
GIA established the 4Cs (Cut, Clarity, Color, Carat Weight) - the global standards for evaluating diamond quality.
GIA's ground-breaking research and unbiased grading and analysis set the global standards that protect the gem-buying public. With campuses, research centres, and laboratory facilities around the world, GIA is the world's foremost authority in gemmology.