"Well, wizarding money comes in coins, as it is harder for magic to duplicate a coin. We have bronze Knuts, silver Sickles and golden Galleons."

"There are 29 Knuts in one Sickle, and 17 Sickles make up a Galleon."

"For many witches and wizards, the use of magic can distort the economy of what most muggles -- non-magic users -- expect. The things we buy with our wizarding money are rare and magical items."