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.
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.
A pre-1965 dime contains 2.5 grams of silver. However, dimes minted after 1965 are made of copper and nickel, and contain no 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.