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 …

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!

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 …

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 …

GIA’s Diamond Origin tells the story of how diamonds mined from these countries support jobs, education, and health care and in many cases, how they help protect the environment in and around …

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 …

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.

Nov 21, 2025 · Explore the GIA Guide to Diamond Engagement Ring Shapes and learn the differences between round, oval, marquise and more. Make a well-informed decision when choosing the perfect …

Jul 9, 2014 · In the 1930s, scientists first began to use two categories to describe a diamond’s chemical composition and atomic structure: type I and type II. Now these categories are further subdivided into …