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

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 …

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 …

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 …

Learn what a GIA diamond is. Discover how GIA's trusted grading system based on the 4Cs ensures transparency and quality for your diamond purchase.

Mar 14, 2013 · The prospect of purchasing a diamond may seem daunting, but through GIA, an unbiased authority on diamonds, you have several handy resources to help you select 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.

Proper color evaluation is a matter of expertise. The correct way to evaluate diamond color is in precise conditions, under controlled lighting, where stones are compared to masterstones with …

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

This framework is both a way to better understand your diamond, and to ensure accuracy in the evaluation of your diamond’s unique characteristics. It is the best way to ensure clear …