If you come across this special coin minted with gold from the California gold rush, you could be looking at a small fortune ...

The combination of "copper" and "penny" might not seem like the best formula for valuable coins considering that you can find ...

Errors increase the value of collectibles because a limited ... Has a thicker rim than normal (a coin’s rim refers to the raised ridge encircling the circumference of the obverse and reverse ...

A rare coin could fetch more than 250 times its face value to someone lucky enough to find one. In 2008 a minting error meant for the first time in centuries coins ...