Karat (kt or K)
Karat (kt or K) :
A traditional measure of proportion equal to 1/24, used by U.S. jewelers to express the purity of gold alloys. Thus "14-karat gold" is legally required to be at least 14/24, or 58.3%, gold. In Britain this unit is spelled carat, like the weight unit for diamonds and other precious stones. American jewelers apparently spell the unit of gold purity with the "k" and the weight unit with the "c" in order to distinguish more clearly between them. (In German, both units are spelled with the "k".)
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