1. 克拉(钻石等宝石的重量单位,合
0. 2克)
A carat is a unit for measuring the weight of diamonds and other precious stones. It is equal to
0. 2 grams.

2. 开(表示黄金的纯度,纯金为24开)
Carat is used after a number to indicate how pure gold is. The purest gold is 24-carat gold.

1. the unit of measurement for the proportion of gold in an alloy
18-karat gold is 75% gold
24-karat gold is pure gold

Synonym: karatkt

2. a unit of weight for precious stones = 200 mg