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 steadily, with …

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 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 …

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 to educate the …

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

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!

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

数十亿年前，压力、高温和碳原子汇聚在地表下 100 英里（161 千米）或更深的地幔中，形成了最初的钻石。 隐藏了数亿年的钻石通过火山活动被带到地球表面，伴随岩浆的流动，在过程中形成了金伯利 …

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, lifestyle …