Trade bar

Trade bars are a form of hard currency made of various precious metals that are accepted as currency throughout virtually all of Faerûn. They are typically marked with the seal or symbol of the mercantile group or nation that minted them. Merchants, trade costers and anyone else who is trading in large quantities typically prefer to use trade bars for their wide acceptance and ease-of-use.

Varieties
Ranging in sizes from 1, 2, 5 and 10 lbs, trade bars are usually minted in silver, or more rarely, gold. Silver trade bars are worth 5 gp per lb, with the gold variety being worth 50 gp per lb. Mirabar is known to issue spindle-shaped black iron bars weighing 2 lbs, that are worth 10 gp within the city and only 5 gp elsewhere.