Q: How many mm is 1 carat?

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1 carat = 6.5 mm

At the girdle, this stone would measure about 6.5 mm.

1 carat = 100 cents = 6.5 mm = solitaire

1 grain is equal to 0.323 Carat (int) 1 carat (int) is equal to 3.086 Grain

1 carat is 0.2g, so 1/2 of a carat equates to a 0.1g gemstone.

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1 carat = 6.5 mm

1 carat = 100 cents = 6.5 mm = solitaire

A half carat diamond of this cut measures 5.2 mm at the girdle; a .65 carat diamond measures 5.6 mm at the girdle. A certified gemologist can give you the exact carat weight of your diamond.

A four-carat round cut diamond measures about 10mm at the girdle. Different cuts would have various mm measurements for each weight.

Depends on the cut shape, but for round diamonds 1 carat is 6.5 mm across. Also 1 carat weighs 200 milligrams

A 1.75 carat diamond billiant cut is about 7.8 mm and a 2.00 carat stone is about 8.2 mm at the girdle. In order to know the exact carat weight of a stone, one must take it to a certified gemologist and ask that it be removed from its setting and weighed.

1 grain is equal to 0.323 Carat (int) 1 carat (int) is equal to 3.086 Grain

A round brilliant cut gem of that weight measures in the 6.5mm range at the girdle.

1 carat is 0.2g, so 1/2 of a carat equates to a 0.1g gemstone.

1 carat = 200 milligrams 1 milligram = 0.005 carat

One carat is equal to 200 mg.

If the diamond is a round brilliant cut, the 3mm measurement at the girdle indicates that the diamond weighs about 1/10th of a carat, or .10 carats.