The 1957 D dime is not a particularly rare coin, but it is still considered to be a valuable collectible. This is because the 1957 D dime was the first dime to be minted in Denver, Colorado. As a result, the 1957 D dime is a popular coin among collectors who specialize in coins from the Denver mint.
If you have a 1957 D dime, it is important to have it appraised by a professional coin dealer to determine its exact value.