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 …

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

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 …

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!

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

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.

As the home of gemological research and education, we invented many of the instruments used by the international gem and jewelry industry, and we even created the 4Cs of diamond quality.

This 1925 photo taken at the Green Vaults by Rosch and Krumbhaar shows crown and pavilion views of the Dresden Green, along with a 17-ct drilled briolette-cut colorless diamond and a light blue …

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