Cut | Color | Clarity | Carat | Shape     Carat   The weight or size of a diamond is measured in carats (ct.). A carat is 0.2 grams and there are 100 points (or 200 milligrams) per carat. With an accuracy of 1/100,000 ct, the IGI. scales provide a highly precise diamond weight and this weight is specified on the Diamond Report to two decimal points.     Carat 0.05 0.10 0.20 0.25 0.30 0.40 0.50 0.70 Øm/ m 2.5 3.0 3.8 4.1 4.5 4.8 5.2 5.8 h m/ m 1.5 1.8 2.3 2.5 2.7 3.0 3.1 3.5   Carat 0.90 1.00 1.25 1.50 1.75 2.00 2.50 3.00 Øm/ m 6.3 6.5 6.9 7.4 7.8 8.2 8.8 9.4 h m/ m 3.8 3.9 4.3 4.5 4.7 4.9 5.3 5.6

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