In excellent condition: about $50.00.
Yes, the 1941 Washington quarter is a 90% silver quarter and it contains .18084oz of pure silver, or 5.12672 grams.
With a date of 1941, it's a common Washington quarter, most are valued only for the silver, about $5.00.
2 to 4 $
At present, one is worth around $4.
Quarters minted before 1965 contain 90% silver, which is 5.625 grams.
1941 is not rare date for Washington quarters, most are valued for the silver at about $1.30, but to clear up a misconception no circulating US coin has been made of pure silver they are 90% silver and 10% copper.
Assuming it's worn from circulation, it would be worth around $3 for its silver content.
It's only 90% silver and 10% copper, value is about $3.00
Being made of 90% silver, this quarter would be valued at $3.81 for its silver value alone. (as of 09/22/2010 price of silver at $21.09 and ounce). If the con was in good shape and not worn it would be valued much higher.
It's neither soiled nor solid. All US quarters were made of an alloy of 90% silver and 10% copper.
US quarters didn't contain any nickel until 1965. 1964 and earlier quarters were made of an alloy of 90% silver and 10% copper. Please see "What is the value of a 1941 US quarter?" for more information.
8-3-11>>> This is a common date coin, in circulated condition most are only valued for the silver about $7.00.