Add Yahoo as a preferred source to see more of our stories on Google. Peter Gudella via Shutterstock Minting coins isn't exactly an exact science. Even though most ...

Most people who come across a Kennedy half dollar assume it's worth exactly fifty cents, maybe a little more if it's silver.

The penny in question is called the 2001-D Lincoln cent mule error coin. It is so rare that it has twice sold at auction for ...

Collectors really prize these coins because they show a unique minting mistake. Condition matters a lot here—well-preserved ones sell for much higher prices. I’ve seen some of these coins go for tens ...

If you are a rare coin collector, you know that it’s not always the perfect coins that are the most valuable. There are many criteria that make a coin worth lots of money in today’s currency, as well ...

An easy-to-miss ‘significant’ error by the Royal Australian Mint has resulted in a batch of $1 coins skyrocketing in value.