Every material is either magnetic or non-magnetic, so the answer to your question is "everywhere". I'm not sure what you're getting at... There are several minerals known that are naturally magnetic, the most common one being magnetite (the lodestone...
Order the 2 for 54 cents and see what you get. Hopefully it is two sheets of wallets.
This reminds me me of binary code...: wallet# - money 1 1$ 2 2$ 3 4$ 4 8$ 5 16$ 6 32$ 7 64$ You can use that to represent any number between 1 and 127, using all the money in a number of wallets - for 53 dollars, you give number 6, 5, 3, and 1 (can't...