what coins have the most silver
90% Silver Dimes, Quarters, and Half Dollars. Roosevelt and Mercury Dimes, Washington Quarters, and Walking Liberty Franklin and Kennedy Half-Dollars minted in 1964 and earlier are 90% silver. The value of most circulated coins minted in the 1920â²s through 1964 is primarily from their silver content. Remember, this is for the most common material. We will and do pay more for any better coins you may have! There are some general guidelines in determining what is âcommonâ.