The net weight of pure silver is .18084oz for all silver Washington quarters
The silver value is about 5-6 dollars.
The value is only for the silver about $3.25
Around $6.
Depending on condition a "D" mintmark may be worth $5.00 an "S" $4.25
1964 was the last year for silver quarters.
The value depends on the silver price, today it is worth around $4.94, but will change as silver prices change.
Assuming it's circulated and has no mintmark. Retail values run from $8.50 to $9.75 depending on the grade. But most are valued for the silver, about $5.00. A 1948 Washington quarter is very common.
About $3 for its silver content. A dealer will pay less.
The 1964 Washington Quarter has .18084oz of pure silver.
Value is $10.00 to $12.50 in MS-60 to MS-63.
It is 90% silver and 10% copper.
$3.00
$50
If you mean a 1966 American quarter, then none.
The coin is 90% silver and 10% copper not pure silver. The date is very common and circulated coins have retail values of $3.00-$4.00
Currently none.
$10