Wizarding currency is currency used by the wizarding world, typically in the form of coins minted in both base and precious metals. The different magical communities of the wizarding world use different forms of currency. For example, Britain use three different coins, the Galleon, Sickle and Knut while the United States uses the Dragot and Sprink. Money in itself is thought to be one of the five exceptions to Gamp's Law of Elemental Transfiguration, meaning it cannot be created from nothing; this stems from the fact that all known attempts to duplicate metals like silver and gold gave proved worthless, as duplicates created via methods such as the Geminio spell are worthless.
Before the Galleon
Before the establishment of the Galleon and the gradual segregation between the magical and Muggle communities, there was no "wizarding currency" like there is now. The Galleon was actually used as a currency that circulated only within the magical community of Hogsmeade.