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.

From 1999 to 2008, the U.S. Mint issued 50 commemorative circulating quarters to honor each state. Now, some of them, because of errors, misprints, or their pristine conditions, can exchange for ...

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 ...

When the U.S. Mint launched its 50 State Quarters Program in 1999, the point of the 10-year initiative was to honor each of the 50 states and share a little bit of history via free classroom lesson ...

PHILADELPHIA — Some rare U.S. state quarters are no longer worth just 25 cents. Collectors say a few special coins from the 50 State Quarters Program can now sell for hundreds or even thousands of ...