except for pennies and nickels all coins 1964 and prior are 90% silver. So it's worth more than 25 cents. Very rarely will you find one in circulation and that makes it rare to some degree. Each quarter contains .18084 oz of pure silver so every 5 is 9/10 of an ounce. If silver is at $19.90 an ounce 9/10 is $17.91 so that about $3.58 per quarter.