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When did silver coins stop and disappear from circulation?. really prudent course was to reduce our dependence upon silver for making our coins.. into Canada's official currency circulation was a success given that, â€œthey are accepted with .
The U.S. Mint never made "pure" silver coins because 99.9 percent silver is too soft to use in circulation. Dimes, quarters and half dollars were minted with 90 percent silver content through 1964. Dimes dated after 1964 are copper-nickel clad and contain no silver.