Errors increase the value of collectibles because a limited number go into circulation before it is spotted and corrected. This Georgia quarter is a big one.

A coin sitting in a jar or drawer could be worth thousands of dollars if it has a rare mistake from the U.S. Mint. Some 1999 state quarters from Georgia have sold for as much as $10,000 due to unusual ...

The Wisconsin state quarter features a cow, cheese, and an ear of corn. One version of this quarter gives the corn an extra leaf low on the ear. This may have happened when a tool was pushed into the ...

TL;DR: Both are AI-powered coin identifier apps available on iOS and Android. CoinKnow (by SenseWake Limited) leads on U.S.

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 ...

A "rare" 5p coin has been sold for 100 times its shop value because it was minted with a rare "blob" on it. The coin was sold for £5 on eBay on Sunday, March 22.

The 1974 Lincoln Cent is one of the most common pennies from the 1970s, but a handful of rare varieties and high-grade examples can make certain coins surprisingly valuable. While most 1974 pennies ...

CoinKnow specializes in high-precision U.S. coin grading and error detection, while HeritCoin offers global identification, expert appraisals, and a marketplace.