Universal Currency

Currency in Eashavar has been standardized since the Age of Enlightenment. While all nations print their own currencies, there are expectations of weight and material makeup for each denomination of coin, and any country which violates these expectations faces grave consequences in the world market. The art upon a coin is typically unique to every nation, and this art is not standardized; certain merchants do not accept certain kinds of coins as a result of their own biases.
All coins are expected to weigh a 1/3 of an ounce. They are also expected to have a content of 1/5 of the material that they correspond to. For example, a 1-gold coin should weigh 1/3 of an ounce and be made of 1/5 gold (typically, the shell is gold, so that it appears gold). A 5-silver coin should weigh 1/3 of an ounce and be made purely of silver. Nominally, 100 copper makes for 10 silver makes for 1 gold. Platinum and exaltium coins were also historically crafted, though they have fallen out of favor throughout most of the world. Where they do exist, a platinum coin corresponds to 10 exaltium coins or 100 gold coins. Colloquially, copper coins are known as pennies, silver coins as shillings, gold coins as crowns, exaltium coins as stones, and platinum coins as pounds.
Certain nations deviate from the global standard, but all of such nations have some subset of their currency which aligns with the standard so that international trade can continue. Deviations from standard coinage such as coins which weigh more than 1/3 of an ounce (e.g., a 2/3 ounce coin made of 1/5 silver being equivalent to a 2-silver coin) are typically acceptable in any market.