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1 Troy Ounce 500 Mills 999 Gold Value

A troy ounce is 112 of a troy pound a troy pound is actually lighter than an avoirdupois pound. The troy ounce 480 grains is heavier than the avoirdupois ounce 437.5 grains. A grain is 64.79891 milligrams mg therefore one troy ounce is 31.1034768 grams g. This measures out to be about 10 percent more than the avoirdupois ounce.

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