Currencies

The most popular item, used for trading amongst commoners...
It is said that these feathers carry the souls of their creators - masters at their craft... The Bronze Feather blacksmiths. 
Their powerful fire melts the mixture of tin and copper, and their hammers shape these beautiful currencies with precision.
Despite having this noble background, there's many smiths who work day and night to supply the commoners with their crafts -
and they truly are rewarded with a handsome sum from the higher standing Furies.