Quote Originally Posted by drozenski View Post
Precious metals such as gold are measured in troy weight. A troy pound is 12 troy ounces, and each troy ounce is 480 grains, making a total of 5760 grains to the pound of gold.



Most materials use pounds and ounces from the avoirdupois system, and such a standard pound is made up of 16 ounces, where each ounce is 437.5 grains, making a total of 7000 grains to the pound of feathers.

All this means that a "ounce" of feathers (or bricks, or lead) is heavier than a "ounce" of gold.

If an ounce of gold is 480 grains and feathers are 437.5 grains isnt an ounce of gold heavier?