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CARAT definition: 1. a unit for measuring the weight of jewels (= precious stones) 2. a unit for measuring how pure…. Learn more.

A carat is a unit of weight used to measure gemstones and pearls. One carat equals 200 milligrams or 0.2 grams. The heavier the stone, the higher its carat weight. Important note: Carat weight is not the …

carat, unit of weight for diamonds and certain other precious gems. Before 1913 the weight of a carat varied in different gem centres.

Dec 6, 2016 · Precious stones are weighed in carats; a single carat is equal to 200 milligrams. Carat is also a variant spelling of karat, which measures the purity (but not the weight) of gold.

CARAT definition: a unit of weight in gemstones, 200 milligrams (about 3 grains of troy or avoirdupois weight). c., ct. See examples of carat used in a sentence.

Aug 4, 2025 · A carat is a unit of mass and weight used to measure gemstones and pearls, most notably diamonds. One carat is precisely equivalent to 200 milligrams (.2 grams).