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

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 …

The 4Cs describe the individual qualities of a diamond, and the value of an individual diamond is based on these qualities. The terms that people use to discuss the 4Cs have become part of …

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

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 …

Nov 24, 2015 · Diamond crystals are brought closer to the Earth’s surface through volcanic activity. Diamonds can be found in shallow alluvial deposits where the crystals settle after …

Apr 9, 2014 · Now that you understand diamond proportions, you’re one third of the way to learning about the factors that influence a diamond’s cut grade. We’ll cover finish, polish, and …

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 …