Our list of U.S. error coins worth money can help you find treasure. Learn to spot doubled dies, off-center strikes, and other valuable minting mistakes.
Think your 1999 Connecticut quarter is just pocket change? Think again! Find out how much your coin is worth and what to look for to spot a valuable one.
A mule coin is an error coin that has an obverse (heads side) design and a reverse (tails side) design that wouldn't ordinarily be on the same coin. See the most famous mule error coins!
All US coins made of silver by denomination + The most valuable silver coins by denomination + Dates the metal composition changed for each US coin denomination.
US mint coin sets from 2000 to 2009 include a lot of cool coins! See the coins included in uncirculated coin sets from the 2000s & what they're worth today.
Error coins with missing clad layers are rare & valuable! Here's how coins can lose their outer clad layers, where to find them, and how much they're worth
The US Mint did not produce any coins with a mintmark from 1965-1967. Silver was also removed from coins. See why 1965 coins, 1966 coins, and 1967 coins are different -- and what's so unique about 1968 coins.
Curious about 1788 / 2000 Virginia state quarter values? Which ones are worth keeping? How can you spot a 2000 Virginia quarter error? Here's everything you want to know about Virginia state quarters!
How much is a 1999 Pennsylvania quarter worth? If it has errors, it's worth hundreds (or thousands) of dollars! See the value of your Pennsylvania quarter
Have an Oregon state quarter? Some Oregon quarters have errors worth lots of money! Here's what to look for & how much Oregon state quarter errors are worth.
