Sorry but there is no such coin. Before 1965 quarters were made of 90% silver and 10% copper. In 1965 to date they were made from about 92% copper and 8% nickel.
$3.00
Assuming it's an American quarter, it's worth $3 for the silver in February 2018.
Going purely by melt value, a U.S. quarter minted before 1965 is currently worth about $5.50 for the silver (as of 11 January 2013).
$10
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.
Sorry! The US never made solid silver coins.
Sorry! The US mint never made solid silver coins. It would be too hard.
It's not solid silver. U.S. silver coins have at least 10% copper in them. See the Related Question for more information.
It is unlikely that you have a clad 1964 quarter, all quarters dated 1964 should be 90% silver, not the copper-nickel clad of 1965-present. Look on the rim of your coin, if it is a solid color (usually solid white but silver tones easily to different colors) it is silver, if it has a line of copper through it it is clad (compare it with a quarter from your pocket change). If it is clad, it is an error and worth quite a bit of money. If it is silver it is worth about $6 for the silver content.
No circulating U.S. coins were ever made of solid silver. They'd be so soft they'd wear out very quickly. All "silver" coins are part copper for hardness.
The US never made solid silver quarters. They would not be hard enough to stand excessive ware during circulation. They were made with a combination of 90% silver and 10% copper.
Sorry! The US mint never made solid silver coins.
$3.00
First thing is, no US coin made for circulation is solid silver, all are 90% silver and 10% copper. The collectible value of any coin depends on the grade, date and mintmark. Post new question with more information.
Assuming it's an American quarter, it's worth $3 for the silver in February 2018.
No "quarter silver dollars" have been made by the U.S. Mint. Please post new question. Is it a quarter or a silver dollar?
Going purely by melt value, a U.S. quarter minted before 1965 is currently worth about $5.50 for the silver (as of 11 January 2013).