An 'international carat' of 205 milligrams was proposed in 1871 by the Syndical Chamber of Jewellers, etc., in Paris, and accepted in 1877 by the Syndical Chamber of Diamond Merchants in Paris.

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: 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 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.

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

Nov 1, 2025 · From Middle French carat, from Italian carato, from Arabic قِيرَاط (qīrāṭ, “carat, similarly small units such as inches”), from Ancient Greek κεράτιον (kerátion, “ hornlet, carob seed ”), from …

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).

What Is Diamond Carat Weight? Diamond carat weight just means how heavy your diamond is. One carat weighs exactly 0.2 grams. That’s tiny, like a single paperclip. But in diamond terms, it’s a big …

Carat denotes the weight of a diamond, not the size. A diamond may have a higher carat weight without appearing larger; and two diamonds of the same carat weight can vary in size if one is cut deeper …