Tales of Tolgard
There is a second monetary system in Materia which grew out of a need to transport even larger sums of money or to make it easier to transport smaller quantities of wealth with needed beasts of burden or wagons. This systems is based upon gemstone commodities.
These gemstones have an established value recognized by merchants all over Materia. While there are rumors of even higher value gemstones in existence, these four are the most commonly seen.