Diamond and most other gem weights are expressed in metric carats. One metric carat equals 0.200 grams (200 milligrams or 1/5 gram). A carat is divided into 100 equal units called “points.” According to US Federal Trade Commission rulings, all weight representations are subject to a 1/200 carat (one-half “point”) tolerance.
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Diameter and Weight: |
Weight Ranges: |
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Small Weights: |
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Estimating Melee Weights By Diameter: |
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