A United States dime minted in 1964 contains 90% silver and 10% copper. The total weight of the coin is 2.5 grams. Therefore, the amount of silver in such a coin is approximately 2.25 grams, or 0.0723 troy ounces. This composition distinguishes it from dimes minted after 1964, which are composed of a clad metal consisting of copper and nickel.
The significant precious metal content of these coins makes them attractive to collectors and investors. The value of a 1964 dime is therefore generally greater than its face value due to the inherent worth of the silver it contains. The historical context is also important; the Coinage Act of 1965 removed silver from dimes and quarters, marking a shift in U.S. coinage composition.