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CARAT (Arab. Oral, See also: weight (originally in the See also: form of a seed) used for diamonds and precious stones, and a measure for determining the fineness of gold
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The exact weight of the carat, in practice, now varies slightly in different places
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In 1877 a See also: syndicate of See also: London, See also: Paris and See also: Amsterdam jewellers fixed the weight at 205 milligrammes (3.163 troy grains)
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The See also: South See also: African carat, according to
See also: Gardner See also: Williams (general manager of the De Beers mines), is equal to 3.174 grains (The See also: Diamond Mines of South See also: Africa, 1902)
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The fineness of gold is measured by a ratio with 24 carats as a
See also: standard; thus 2 parts of alloy make it 22-carat gold, and so on
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