Troy ounces are heavier ounces than avoirdupois, 31.1035g versus
Dictionary says troy system originated in France. Any history buffs
know more? I’d love to hear.
U.S. precious metals are priced “daily” in futures markets, and the
troy ounce is the unit used in quotations.
There’s a troy pound. Never used it in daily transactions, myself.
Dan from I.J.S. - sorry for the long silence.