Copper coin -
Silver coin - need 100 copper coin for 1 silver coin.
Gold coin - need 100 silver coin for 1 gold coin.
Royal coin-- can only found in the royal family's for 1 Rayal coin atleast 1000 gold coin is needed not 100.
If you have a royal coin that's means you
are from the Royal.Because only the
royal can use this currency between
them. They cannot buy normal things
with it, but still they can sell it.