A Troy ounce is roughly 9.7% heavier than an Avoirdupois ounce. That translates to 14.58 Troy ounces equals an Avoirdupois pound (16 ounces). Sometimes the buyer will see or hear about products that are sold as a pound of a precious metal; usually it is silver. It is important to verify if it is an avoirdupois pound (14.58 troy ounces) or a troy pound (12 troy ounces). Products are availabe in both sizes.
The more common forms of measurement for precious metals is the metric system--grams or kilos, which are then converted to troy ounce. The exception to this is jewelry, where prices can be quoted in either grams or penneyweights.
|20 Penneyweight (Dwt)||1.00 oz|
|31.1 Grams (Gr)||1.00 oz|
|480 Grains (Gn)||1.00 oz|
|1 Kilo||32.15 oz|