By GovMint :
Identifying pure silver dimes largely hinges on recognizing key characteristics and understanding the history of U.S. coinage. Circulating dimes minted in 1964 or earlier, such as Mercury Dimes, are predominantly composed of 90% silver. These specific coins can be easily distinguished by their unique metallic luster and coloration, which leans towards a whitish-grey hue, indicative of their high silver content. Another practical method to verify the silver content involves examining the coin's edge; genuine silver dimes will exhibit a uniform appearance without the presence of a copper-colored ring that is typically found in later coins made from a copper-nickel alloy. Moreover, dimes featuring Lady Liberty, such as those from the Seated Liberty series minted between 1837 and 1891, are almost certainly made of silver, providing another straightforward criterion for identification.
By combining these methods—focusing on the coin's date, examining its edge, and noting its color and design—one can usually effectively discern whether a dime is made from pure silver.
