karat
Definition
Measure of the purity (fineness) of gold, or its proportion in an alloy. Pure gold is defined as 24 karats or having a fineness of 1000: one karat equal to 41.66 fineness. A 22 karat gold-alloy, for example, has 22 parts gold and 2 parts other metal (usually copper), and has fineness of 916.66 (is 91.666 percent pure gold). Similarly, an 18 karat gold-alloy is 75 percent pure gold. In the UK both carat and karat are spelled as carat, while in Germany both are spelled as karat.
karat is in the Industries, Manufacturing, & Technology subject.
karat appears in the definition of the following term: carat
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