Diamond Stone Original Certified Diamonds are graded according to the quality of cut, clarity, color and carat. Known as the Four Cs, these four points determine the value of a particular stone: 1. Cut: the shape of the cut stone and how well that cut showcases the stone. 2. Clarity: the clearness of the cut stone and how the absence of impurities adds to the reflective ability of the diamond. 3. Color: refers to the colorlessness of a standard diamond. A fancy (or colored) diamond tends to be graded on the quality of its color, rather than its colorlessness or carat weight. Stones with intense, even colors will often be cut to emphasize the color of the stone, rather than its sparkle. Extremely rare colors such as blue, pink, orange or red add high value to a naturally formed diamond. 4. Carat: refers to the weight of the cut stone, not the size. Larger diamonds are more rare, so larger diamonds are more valuable per carat than smaller stones of the same quality.
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