Dime minted before 1965 contain 90% silver. With a total weight of 2.5 grams, that makes 2.25 grams of silver per dime.
U.S. quarters dated 1964 or earlier contain .18084oz of silver.
All pre-1965 US quarters and dimes are 90% silver.
90%, or 2.25 grams.
U.S. quarters dated 1964 or earlier are 90% silver and 10% copper, they contain .18084oz of pure silver.
If they are pre-1965 they are worth about $2.10 each in silver content, if they are dated 1965 or after, they are worth only 10 cents.
Pre-1964 US dimes have collectible and silver values. 1965 to date are 10 cents.
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U.S. quarters dated 1964 or earlier contain .18084oz of silver.
All pre-1965 US quarters and dimes are 90% silver.
90%, or 2.25 grams.
Mercury dimes were made from 1916 to 1945 so ALL of them are pre-1964. You can find values at many sites, such as the one linked below.
U.S. quarters dated 1964 or earlier are 90% silver and 10% copper, they contain .18084oz of pure silver.
A 1964 Roosevelt Dime has .07234oz of pure silver. as do all pre-1965 Roosevelt dimes regardless of date or mint mark. Those dated 1965 and later are made of copper-nickel.
Beginning in1965, dimes were made without silver. Up to 1964, dimes were made of 90% silver. The nominal weight was 2.5 gm so 0.90 * 2.5 gm = 2.25 gm of pure silver.
Yes, the reason why quarters (and dimes, and half dollars) dated 1964 and earlier are worth more than their 1965 and later coins is because they are 90% silver.
Silver prices vary day to day. Today 28 Dec 2017, a 1964 or earlier dime contains $1.2181 in silver. The value of the coin itself will vary greatly depending on condition, year and mint mark.
One pre-1965 silver dime contains 2.25 grams of silver (90% silver, 10% copper, total weight of 2.5 grams), and one roll contains 50 dimes, which makes 112.5 grams of silver per roll.