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 isometric, which …

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 steadily, with …

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 being transported …

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 this gem!

With an unbiased diamond evaluation, you’re free to focus on its beauty. We issue a variety of diamond reports, ranging from the GIA Diamond Dossier® to the GIA Diamond Origin Report.

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 an …

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 resistance to …

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!

Presents the first scientific and historical study conducted on the 2.33 ct Winston Red, the fifth-largest known Fancy red diamond in existence.