Jeweler's measure is a term used to describe the unit of measurement for precious stones and metals. The three crossword solutions for this term are CARAT, karat, and caret. CARAT is a unit of mass equal to 200 milligrams and is used to measure the weight of diamonds and other gemstones. Karat is a unit of fineness for gold and other precious metals, with 24 karats being pure gold. Caret is a unit of weight equal to 1/4 of a CARAT.