no to soft to make coins out of solid silver . .999% is the most silver in any coin .
There is no such thing as pure silver quarters, there are 90% silver quarters which are dated 1964 and earlier though in the US.
1873 to 1964 .18084oz pure silver
First of all, silver U.S. quarters dated 1964 and earlier are 90% silver, not pure. As far as 1964, it's an extremely common date, currently worth about $4 for the silver content.
US quarters (and dimes, half dollars and silver dollars) were never made of pure silver. Up till 1964, they were struck in an alloy of 90% silver and 10% copper.
U.S. quarters dated 1964 or earlier are 90% silver and 10% copper, they contain .18084oz of pure silver.
Quarters minted before 1964 in the United States were made with 90% silver and 10% copper.
Niether US nor Canadian quarters have ever been made of zinc. Please check your coin again and post a new, separate question with its date and country of origin. US quarters were made of 905 silver and 10% copper until 1964. Since they they've been made of cupronickel outer layers bonded to a pure copper core. Canadian quarters were made of 80% silver, then 50% silver, followed by pure nickel and finally plated steel
They were never pure silver, but all half dollars (as well as dimes and quarters) 1964 and earlier are 90% silver.
No, pure silver is too soft for most circulating coinage. All silver US quarters have been alloys around 90% silver and 10% copper. Canadian quarters were sterling silver at first (92% silver) then reduced to 80% silver, then to 50% silver than finally silver was fully removed.
Pre 1964 quarters are made of 90% silver. Sterling silver is 925%. So no. Yah that's right. But I think you missed a decimal point out! Sterling silver is 92.5% pure also denoted 925 in millesimal fineness
To clear things up, the US never made pure silver quarters. Circulating quarters were made of 90% silver and 10% copper from 1796, the first year of issue, until 1964. In addition, modern quarters don't have any silver in them at all. They're made of a pure copper core clad with outer layers of copper-nickel alloy.
1932 - 1964 Silver Quarter is 90% silver Quarters after 1964 are copper nickel clad, there is no silver. only the 1/2 dollars or "50 cent" pieces from 1965-1970 are 40% silver. There was a 1976 silver quarter as well as the proof silver state quarters.