When a professional appraiser is grading a diamond a chart is used to analyze each stone. Factors such as weight and cut are quantitative and measured while other characteristics, such as color and clarity, are graded by comparison, and, well, let's just say expertise and “feel”.Many consumers, especially those who do not have a diamond buyer, need to rely on certificates from rating agencies for their diamonds when comparing one to another. To complicate matters for consumers, there are several different rating agencies, each having very different industry standards. Therefore,...
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