A 90% US silver quarter contains .18084oz of pure silver, or 5.12672 grams. All quaters before 1965 had this 90% composition.
$50
If you mean a 1966 American quarter, then none.
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.
All silver Washington quarters have the same amount of silver it's .18084oz of pure silver
The 1964 Washington Quarter has .18084oz of pure silver.
It is 90% silver and 10% copper.
As of 20 December 2015, one U.S. silver quarter is worth $2.56 in melt value.
$3.00
$50
If you mean a 1966 American quarter, then none.
A quarter got its name because it's worth one quarter, or one fourth, of a dollar. That is, a dollar is worth as much as four quarters. Being that the quarter is worth less, it's smaller.
Currently none.
$10
The silver value is about 5-6 dollars.
The actual amount of pure silver is .18084 of an ounce.
1964 was the last year for silver quarters.