A '''troy ounce''' is a unit of measure used for precious metals, such as gold, which dates back to the [[Middle Ages]]. Its name is based on Troyes, France. There are 12 troy ounces in a troy pound, in contrast with 16 conventional ounces to a conventional pound.
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A '''troy weight''' has been used to measure gold, silver and other precious metals, dating back to the [[Middle Ages]]. A troy pound consists of 12 troy ounces, and a troy ounce weights 480 [[grain (weight)|grain]]s. The troy ounce weighs about 31.1 grams, while a regular ounce is around 28.3 grams.
A troy ounce is slightly heavier than an ordinary ounce: there are 14.58 troy ounces in one conventional pound.
A troy ounce is slightly heavier than an ordinary ounce: there are 14.58 troy ounces in one conventional pound.