Coins used in commerce to purchase items by the populace are in circulation. Coins that have any kind of wear from handling are also considered circulated.

Commemorative

A special coin or medal issued to honour an outstanding person, place, occasion or event. Often commemorative coins are a one time or short lived production. Many times commemorative coins are not produced for general circulation.

Currency

Any kind of coins or paper money that is used as a medium of exchange.

Denomination

Different values of coins or currency (1-, 1/2-, 1/4- and 1/10 oz).

Face value

The exchange value for which a coin is intended to be spent or exchanged.

Fine gold

The purity of a gold coin or metal. .999 fine gold means the item is 99.9% pure solid gold. A measure of the proportion of precious metal in alloys.