I’m interested in Gold, don’t chuck me out of the Bitcoin club please 😂

Gold is measured in troy ounces,

Troy ounce: 31.1035 g

Avoirdupois ounce (modern ounces): 28.3495 g

They standardised weights at the French market town of Troyes, which was a major European trading hub in the 12th–13th century. The “ounce of Troyes” stuck for gold and silver, long after everything else moved on.

Avoirdupois comes from Old French: “aveir de peis” → literally “goods of weight.”