Business and Personal Finance Dictionary

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• TROY OUNCE
  
  A unit weight, equal to about 1.1 avoirdupois ounces. The troy ounce is the traditional unit weight for precious metals, believed to be named after a weight used at the annual fair at Troyes in France in the Middle Ages. 1 ounce troy = 480 grains = 31.04 grams 1,000 grams = 1 kilogram = 32.15 ounces troy 1,000 kilograms = 1 metric ton = 32,150 ounces troy
  
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