A system of weight measurement used for precious metals and gems, where a troy ounce is heavier than a regular ounce.
From Troyes, a city in France famous for its markets in the Middle Ages. Merchants from Troyes established this weight system, which became the standard for measuring gold, silver, and diamonds.
Troy weight comes from the French city of Troyes, which was so famous for its medieval trade fairs that its name became synonymous with a whole system of measurement—it's why gold dealers worldwide still use a unit named after a place nobody thinks about.
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