(Homonym: carat, caret, carrot).
The unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold; Also called: carat.
A unit of fineness for gold equal to 1/24 part of pure gold in an alloy.
Or carat; The unit of purity in gold in the us. Pure gold is 24-karat; 22-karat (the purest used in jewelry) is 22 parts gold and two parts alloy (to give greater strength).