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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
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
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 Quality Factors 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 international language that jewelry professionals can use to describe and evaluate individual diamonds
Diamond Fun Facts 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 being transported away from the kimberlite pipes by geologic activity and rivers
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 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
GIA to Use New Descriptive Terminology for Laboratory-Grown Diamonds The revised GIA description system for laboratory-grown diamonds will confirm that the submitted item is a laboratory-grown diamond and whether it falls into one of two categories, ‘premium’ or ‘standard ’
Analysis Grading - GIA. edu GIA is the world’s most trusted name in diamond grading and gemstone identification
What Does Fluorescence Tell Us? | GIA Research Because phosphorescence is so rare in natural stones, any diamond that exhibits this glow warrants further analysis to determine its origin While not conclusive on its own, phosphorescence is an important clue among many that can help identify a diamond’s true nature