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Natural Diamonds | Diamond Stone – GIA C Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA
GIA Diamond Research 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 treatments, GIA is staying at the forefront of characterization and identification of laboratory-grown diamond
GIA - Report Check important limitations All Report Check information is subject to these limitations Interested in getting your diamond graded by GIA? Submit Your Gem Now
GIA Diamond Grading Scales: The Universal Measure of Quality - GIA 4Cs 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 highest quality diamond First up, an overview of the 4Cs: Color, Clarity, Cut, and Carat Weight
Diamond Clarity | GIA 4Cs The clarity of a diamond is based on the size, location, visibility and number of inclusions or blemishes Internal and surface reaching characteristics are called inclusions External features are called blemishes Precise clarity grading is the secret to accurately evaluating a diamond
Diamond History and Lore 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 research by chemists, physicists, geologists, mineralogists, and oceanographers
Diamond Description 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 means the carbon atoms are bonded in essentially the same way in all directions
Home | GIA 4Cs 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 diamond industry and most importantly, protect diamond consumers everywhere
How-To Guide: Testing Diamonds and Gems using UV Light Diamond fluorescence can occur in a wide range of patterns and colors, helping to tell the story of a diamond’s unique growth history These HPHT laboratory-grown diamonds exhibit strong phosphorescence under SWUV