Sorting through your spare change might seem like a mundane task, but collectors know that certain state quarters hiding in your pocket could be worth far more than twenty-five cents. S. Mint in 1999, ...

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. Each state received a specific quarter design during a program which ran from 1999 to 2008. However, during this time, some of the ...