20th-century silver coinage was struck in 90% silver / 10% copper, so your coin has (0.90 x 6.25) gm, or 5.625 gm of pure silver. That figure holds true for all Barber, Standing Liberty, and pre-1965 Washington quarters.
At current silver prices you coin is worth about $3.
Updated for Apr 11, 2011
Currently a 1960 coin is worth around $8.77 in silver/copper
The value of silver varies, as it is a commodity. Depending on the condition and the mint, you may have values above the value of the silver inside of it. Quarters weigh 6.25 grams and are 90% silver by composition. At the time of this writing, a silver quarter for melt value would be worth about two US dollars.
None.
All dimes and quarters dated 1965 or later, and all halves dated 1971 or later, are made of copper-nickel.
Also, dollars dated 1971 to 1999 are made of copper-nickel, and the new ones are brass.
All circulating quarters dated 1965 and later are made of copper-nickel. They don't contain any silver, so they're only worth 25 cents if you found it in change.
An uncirculated one might sell for 50 cents in a coin shop.
1964 was the last year for US silver quarters. A 1966 is just face value.
It's made of .900 silver, i.e. 90%, and weighs 6.25 gm so the total content of pure silver is 0.90 x 6.25 or about 5.63 gm.
The value is about $3.00 just for the silver
The coin is not "all silver" its 90% silver and 10% copper. The value is about 3 bucks just for the silver content.
It is a common date and worth about $5.25 in silver content.
about $6.50-$7.50
The 1964 Washington Quarter has .18084oz of pure silver.
There is 2.25 grams of silver in a 1960 dime.
It is 90% silver and 10% copper.
$3.00
$50
If you mean a 1966 American quarter, then none.
Currently none.
$10