coins

So, I'm seeking numismatists and others knowledgeable about coins, scales, and particularly about money changers and setting up a fantasy system of multiple different coins from different nations to add realism. Yes, I'm aware of D&D's penchant for using a base-10 system, and I'm not trying to...

The "classic" currency of olden times is coins of precious metals. But when a mage has the power to turn any substance into another (alchemy), or just create a huge heap of coins, the economist in me just screams about inflation. What solutions have you come up with for currency in a world...