Topics: Ounces, Weights

What is the difference between a troy ounce and a standard (or avoirdupois ounce)?
- Belle, CA
Troy ounce is the basis of weight system used for precious metals. A standard (avoirdupois) ounce is the weight system used for food and non-precious metal items.

One troy ounce = 31.1 grams
One avoirdupois ounce = 28.4 grams

Refer to ''A Beader's Guide to Jewelry Metals'' chart for in-depth information about the metals used in jewelry.

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