- 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
- What is Diamond Color What it Means | GIA 4Cs
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 established color grades Once properly evaluated, color is documented based on the GIA D-to-Z Color Scale From D for colorless to Z for light
- 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
- 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
- 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
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