Here are 20 rare state quarters worth additional value, according to Gainesville Coins, USA CoinBook and PCGS.

Some state quarters in pristine condition could be worth well over $500. Before using your quarters, check whether you have any of these in your wallet.

Starting in 1999, the U.S. Mint began a years-long program where they released aspecially designed quarter for all 50 states. It is widely lauded as the mostsuccessful coin program in the Mint's ...

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 ...

Digging through your change jar? You may want to set aside any quarters from 1999 as one of them may be worth $10,000. While most quarters are worth exactly 25 cents ...

Check under the date on the Washington side: no mintmark or a D means the coin is worth exactly 25 cents. The $19,200 sale involved one of only 7 MS69-graded silver S-mint quarters; the next identical ...