The closest the U.S. has to a solid silver coin is the 999 fine bullion pieces sold for investment rather than for spending. They carry the denomination $1 but that's purely artificial. Their price fluctuates with the spot price of silver/
As for $1 coins intended for use in daily commerce, they were never solid silver; it wouldn't stand up to wear so it was alloyed with 10% copper for hardness. Later $1 coins (1971 on) aren't silver, they're either copper-nickel or brass.
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What is the value of an 1864 silver dollar.
W hat is the value of a 1885 silver dollar
The coin isn't solid silver, that metal is too soft to put up with circulation wear. These coins were minted from an alloy of 90% silver and 10% copper. Two varieties of silver dollar were struck in 1921. Please see the Related Questions for more information.
the value is usally a dollar
US coins were never made of solid silver because it's too soft. From 1965 to 1970 US halves were only 40 percent silver; the rest was copper.