+The **Troy ounce** is a unit of mass, historically used for [precious metals](/wiki/precious_metals) like gold and silver. It is slightly heavier than the standard [avoirdupois ounce](/wiki/avoirdupois_ounce), primarily serving the trade of valuable commodities.
+## See also
+- [Gold](/wiki/gold)
+- [Silver](/wiki/silver)
+- [Weight](/wiki/weight)
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