Troy oz silver weight
A troy ounce of Silver is equal to 31.10 grams. It’s a unit of measure first used in the Middle Ages, originating in Troyes, France. You may notice that this is slightly heavier than the 28.35 grams we’ve come to expect from the standard ounce (also known as the avoirdupois ounce). Silver is measured in troy ounces. Each troy ounce contains about 31.1034768 grams of silver, which is slightly higher than a standard ounce which has only 28 grams.