Tarnish. Silver oxidizes very easily.
BUT - please don't try to clean them because cleaning will damage the metal and reduce their value.
For U.S. dimes and quarters, anything dated before 1965 is silver.
Modern silver quarters are only made for sale in special "Prestige" proof sets sold to collectors. They're made of the same 90% silver / 10% copper alloy that was used for circulating quarters before 1965. Circulating quarters dated 1965 and later are made of nickel and copper, and do not contain any silver.
US Silver quarters (produced as regularly circulated coinage through 1964, and as part of silver proof sets since the early 1990's) are an alloy of 90% silver and 10% copper. They are not plated, but rather a consistent 90% silver alloy throughout the coin. Quarters dated 1965 and later don't contain any silver. They're made of a "sandwich" consisting of outer layers of 25% copper and 75% nickel bonded to an inner core of pure copper.
If you mix silver and black you get pewter.
Dark silver.
NO. 1980 quarters are not silver.
There is no such thing as pure silver quarters, there are 90% silver quarters which are dated 1964 and earlier though in the US.
All US quarters dated 1964 or before are 90% silver.
The last year for silver quarters was 1964.
Sell silver quarters by there weight. You will probably make better money anyway from silver quarters.
90% silver U.S. quarters have a silver value of $7.50 as of 9-8-11.
All U.S. quarters dated 1964 and earlier contain silver.
No. The last year for silver dimes and quarters was 1964.
90% silver quarters were issued from 1794 to 1964. In 1975 & 1976 collectors coins were struck in 40% silver. Starting in 1992 90% silver quarters are in silver Proof sets.
4 quarters = 1 dollar.
All U.S. quarters dated 1964 and earlier are silver.
No 1972 US quarters have silver in them, the last year for silver quarters was 1964. so spend it