Dimes, quarters, and half dollars dated 1964 and earlier, and dollars dated 1935 and earlier, are 90% silver and 10% copper.
Yes, it is 90% silver.
Most are only valued for the silver, about $6.00. 1943 is a common date.
90% silver
$42
No such coin exists. The last Liberty quarter (the standing Liberty) was last minted in 1930, however if you have a Washington quarter, that date is rather common and it is worth around $5.25 in silver content in average circulated condition.
This is not something made by the US mint. 1943 quarters are 90% silver and 10% copper.
It is 90% silver. The rest is copper.
About $3 due to its silver content.
All quarters dated 1964 and before are made of 90% silver, 10% copper. In average condition a 1943 quarter is pretty much only worth its metal content, about 0.18 times the current price of silver. If it's in better shape, please see the Related Question for more information.
80% silver, 20% copper
silver content in 1867-1967 Canadian quarter
1943-D is a common date for this series, a coin in average condition is valued at about $4.00 just for the silver.