The 50 State quarters was a series of circulating commemorative quarters released by the United States Mint. Minted from 1999 through 2008, they featured unique designs for each of the 50 US states on the reverse.
5 strings on the guitar on the Tennessee state quarter.
Coin with partially rubbed off "In God We Trust" motto
Image: 2006 50 state quarters coin south dakota proof reverse
United States commemorative coins
The United States Mint has minted numerous commemorative coins to commemorate persons, places, events, and institutions since 1848. Many of these coins are not intended for general circulation, but are still legal tender. The mint also produces commemorative medals, which are similar to coins but do not have a face value, and therefore are not legal tender.
Image: Columbian exposition quarter dollar commemorative obverse
Image: Columbian exposition quarter dollar commemorative reverse
Image: Booker t washington half dollar 1946
Image: 1995 Centennial Olympics Baseball Uncirculated Half Dollar