Anyone know much about Iranian coins? At my work, we got in 5 Iranian coins, and they sound like they're silver. One of them is fairly small, about the size of a dime with a marking that looks like a "1" on it, two that are maybe slightly larger than quarters, maybe, with "upside-down hearts" on them , and 1 slightly smaller than a half-dollar and one about the same size a s a half dollar with the bust of the Shah on them. I can't find much online about them.
Thanks for the help!