Currency
From Dwarf Fortress Wiki
The game's currency is measured in "☼", sometimes called "dwarfbucks" or "db's". Each item has a specific trade value in ☼.
When the dwarven economy sets in, coins of legal currency metal will have monetary value in addition to their trade value. Copper coins are worth 1☼, silver coins are worth 5☼ and gold coins are worth 15☼.
Independent of this, the trade value of any coins is 10 multiplied by the metal value, when used in trade, or collectors coins sold in shops (not copper, silver or gold coins).
Using coins as a trade good is not advisable as they have no quality levels.
Dwarven coins are minted at the Metalsmith's forge.
