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

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

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 …

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 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 …

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 …

important limitations All Report Check information is subject to these limitations. Interested in getting your diamond graded by GIA? Submit Your Gem Now

Whether examining the laboratory-grown diamonds submitted for grading reports, growing CVD diamonds at our research facility in New Jersey, or altering these materials through …

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 …

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