The US never used pure silver in circulating coins. It's too soft.
The 1964 Washington Quarter has .18084oz of pure silver.
The ASW (actual silver weight) is .18084oz pure silver.
The actual amount of pure silver is .18084 of an ounce.
The Actual Silver Weight (ASW) is .18084oz of pure silver.
The net weight of pure silver is .18084oz for all silver Washington quarters
All silver Washington quarters have the same amount of silver it's .18084oz of pure silver
The 1950 US quarter is 90% silver and 10% copper.
The silver value is about $6.00. NOTE: The US has never made a pure silver quarter, they are 90% silver & 10% copper.
A 90% US silver quarter contains .18084oz of pure silver, or 5.12672 grams. All quaters before 1965 had this 90% composition.
You don't have a pure silver quarter as the US has never minted a pure silver (99.9% pure or higher) silver quarter. Instead what you have is a 90% silver quarter which would be dated 1964 or prior. The value depends on a number of factors including the date, the mintmark and the condition. But a silver quarter is worth $5-6 in scrap silver regardless of type or condition, however some quarters can be worth significantly more.
Yes, the 1941 Washington quarter is a 90% silver quarter and it contains .18084oz of pure silver, or 5.12672 grams.
The coin is 90% silver and 10% copper not pure silver, but a date is needed.