"Carat" as used in association with gold is not a unit of mass, but of purity. 14 karat gold is 7/12 gold and 5/12 other metals (typically Copper, and Silver).
A "carat" as a unit of mass is used with gemstones, not with gold. A carat is 200 mg, meaning that 14 carats would be 2.8 grams.
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