The value of a 1964 Washington quarter is determined by two primary factors: its silver content and its numismatic, or collectible, condition. Because 1964 was the final year that United States quarters were struck with a 90% silver composition for circulation, every one of these coins has an intrinsic value based on its precious metal content that is significantly higher than its 25-cent face value.
The baseline worth of a 1964 quarter is its silver "melt value." Each coin contains 0.18084 troy ounces of pure silver. This value fluctuates daily along with the spot price of silver on the commodities market. For most 1964 quarters that are in average, circulated condition, their value will be tied directly to this fluctuating melt price, which is typically several dollars.
Beyond its silver content, a 1964 quarter can command a higher premium based on its physical condition, or grade. Coins that were never circulated and remain in mint state are more desirable to collectors. These uncirculated coins, from either the Philadelphia Mint (which have no mint mark) or the Denver Mint (with a 'D' mint mark), can be worth more, often in the range of $8 to $15 for common mint state grades.
For specimens in exceptionally high, professionally certified grades, the value can increase substantially. A near-perfect, gem-quality 1964 quarter can be worth hundreds of dollars to serious numismatists. In summary, while any 1964 quarter is valuable due to its silver, its ultimate worth is a combination of the current silver price and its state of preservation.
