Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.

Whether examining the laboratory-grown diamonds submitted for grading reports, growing CVD diamonds at our research facility in New Jersey, or altering these materials through …

While choosing a diamond is a very personal decision, evaluating a diamond should always be a matter of precision. At GIA, we are incredibly proud that our 4Cs of diamond quality continue …

Mar 14, 2013 · The prospect of purchasing a diamond may seem daunting, but through GIA, an unbiased authority on diamonds, you have several handy resources to help you select the …

Fancy Color Diamond Dazzling brilliance. Captivating color. These are the planet’s most valued gems.

what's in a name? Diamond [dye -mund] (noun) Diamond comes from the Greek word adamas which means “invincible.” For being the hardest material on earth, that is the perfect name for …

Diamond forms under high temperature and pressure conditions that exist only within a specific depth range (about 100 miles) beneath the earth’s surface. Diamond’s crystal structure is …

Diamond’s splendor has been appreciated for centuries, but there was not much scientific knowledge about it before the twentieth century. Since then, diamond knowledge has grown …

GIA’s Guide to Gemstones: Gem Encyclopedia GIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page …

May 3, 2024 · Examines new developments in the story of diamond formation and their extraction from the earth.