US quarters dated 1964 and before weigh 6 25 grams. and are 90% silver 10% copper.
The 1964 Washington Quarter has .18084oz of pure silver.
It is 90% silver and 10% copper.
$3.00
$50
If you mean a 1966 American quarter, then none.
Currently none.
$10
Pre-1965 silver quarters are 90% silver with a total weight of 6.25 grams, which is then 5.625 grams of silver per quarter.
The Actual Silver Weight (ASW) is .18084oz of pure silver.
1964 was the last year for silver quarters.
The value is only for the silver about $3.25
The actual amount of pure silver is .18084 of an ounce.