克拉 Carat (mass)
（重定向自Metric carat）
克拉，或称卡、卡拉，从1907年国际商定为宝石计量单位开始沿用至今。既是珠玉、钻石等宝石的质量单位，也指贵金属的纯度比例。平常所说的30分钻石就是0.3克拉（0.06克），50分的钻石就是0.5克拉（0.1克）钻石，此时，“克拉”英文是carat，简写成CT，通常说1克拉都是1CT。在香港、澳门等地，在买卖中惯用“克拉”表示黄金等贵金属的纯度，为不混淆两者，故以希腊文keration的首字母k为符号。
Metric carat
中文百科
英语百科
Carat (mass) 克拉
（重定向自Metric carat）
The carat (ct) is a unit of mass equal to 200 mg (0.2 g; 0.007055 oz) and is used for measuring gemstones and pearls. The current definition, sometimes 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. The carat is divisible into one hundred points of two milligrams each. Other subdivisions, and slightly different mass values, have been used in the past in different locations.
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