Proof dimes carry a premium, not sure on exact value for them it would depend on year/mintage. There are silver proofs as well as clad proofs, look at the edge of the dime and look for the telltale copper strip. If there is no copper strip visible they are silver. All silver proofs are 90% silver, not sure what 90% of 2.5 grams is, but a dime weighs 2.5 grams.
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