Want to raise some cash by selling gold jewelry? To figure the sale value of a gold item, you must determine two things: its weight and purity. Gold can be weighed in a number of ways. An ounce on a generic U.S. scale is equivalent to 28 grams; a Troy ounce, which jewelers use, equals 31.1 grams.
Some dealers measure in pennyweights (abbreviated dwt), each of which equals 1.56 grams.
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