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

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 …

Diamond stands at the apex of the hardness scale with a value of 10. It also has the highest thermal conductivity and the highest molar density of any terrestrial material, as well as a high …

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 …

Jan 10, 2017 · Incredibly hard, highly refractive, practically impervious to heat, diamond is a crystal form of carbon. But what makes it a real diamond? Find out!

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

It isn’t until a diamond is cut, that the real beauty of a diamond begins to take shape. With a GIA Diamond Grading Report, you can confidently make your next diamond purchase.

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

Nov 21, 2025 · This diamond shape guide will help you understand the characteristics of different diamond shapes, so you can choose the engagement ring shapes that best suit your taste, …

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 …