Carat (Mass)
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The carat is a unit of mass used for measuring gems and pearls (for the use of carat as a measure of purity of gold, see carat (purity)). Currently a carat is defined as exactly 200 mg (0.007055 oz, 3.086 grains). This definition, known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, and soon afterwards in many countries around the world. It is universally used today[citation needed]. The carat is divisible into one hundred points of two milligrams each. For diamonds, a paragon is a flawless stone of at least 100 carats (20 g). The ANSI X.12 EDI standard abbreviation for the carat is CD.…mehr

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The carat is a unit of mass used for measuring gems and pearls (for the use of carat as a measure of purity of gold, see carat (purity)). Currently a carat is defined as exactly 200 mg (0.007055 oz, 3.086 grains). This definition, known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, and soon afterwards in many countries around the world. It is universally used today[citation needed]. The carat is divisible into one hundred points of two milligrams each. For diamonds, a paragon is a flawless stone of at least 100 carats (20 g). The ANSI X.12 EDI standard abbreviation for the carat is CD.