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

Add Yahoo as a preferred source to see more of our stories on Google. Once known as the “Hobby of the Kings,” coin collecting is a global pastime open to anyone with an appetite for accumulation.

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.

Each state received a specific quarter design during a program which ran from 1999 to 2008. However, during this time, some of the 25-cent coins had errors or misprints. These engraved mistakes, ...

If you grew up in the 1990s or early 2000s, you probably remember collecting state quarters at some point. There were even cardboard maps in the shape of the U.S. where you could pop your latest finds ...