There are very good reasons the coin has no copper center and no mint mark:
First, "sandwich" coins weren't minted until 1965. Before that, dimes, quarters, halves, and dollars were made of 90% silver.
Second, before 1968 the mint mark was on the back under the bow, not on the front, and Philadelphia did not start using a P mint mark on quarters till 1980.
Over 1.2 Billion 1964 quarters were churned out so they have no real interest to collectors. You have a normal circulation coin for that date, nothing special at all, but ...
The really good news is that the price of silver has gone up so much that your coin is worth about $3.00 (as of 09/2008) retail just for its silver content. Take it to one of those "we buy gold and silver" places; they may give you $2.00 or so as a wholesale price.
All quarters dated 1965 and later are made of a "sandwich" of copper and nickel.
Yes, all quarters dated 1965 and later are made out of a copper-nickel "sandwich", you can see this on quarters by seeing the copper line along with the nickel. If you buy a silver quarter, you will see it is all a single colour.
no there was never a copper quarter
25¢ All quarters dated 1965 and later are made of a "sandwich" of copper and nickel. If it looks like silver it's been plated.
25¢ All quarters dated 1965 and later are made of a "sandwich" of copper and nickel. If it looks like silver it's been plated.
The quarter may be worth something depending on the ear it was minted. You can take the coin to a collector and have them appraise the quarter.
The coin can't be solid copper. From 1965 to date all quarters are made from a copper-nickel sandwich composition. If it's a dark color, it's likely been exposed to some chemical that has corroded it. Take it to a coin dealer for an assessment.
Pennies are only copper-plated now. U.S. cents have a zinc center and Canadian cents have a steel center. U.S. dollar coins are made of a multi-layer "sandwich" consisting of manganese-brass and copper. Canadian dollar coins are nickel or steel with a nickel-brass plating.
Current US quarters are made of a "sandwich" consisting of a pure copper core clad on both sides with a layer of cupronickel alloy (25% nickel and 75% copper). Overall, copper makes up about 92% of the coin by weight. Current Canadian quarters are made of an alloy of 94% steel and 3% copper, plated with nickel.
This a great question but I need clarification - are you referring to the Seated Liberty Quarter, the Barber Quarter, the Standing Liberty Quarter, or the Washington Quarter? If you are referring to the Washington Quarter, please provide to me the date of the coin since these quarters were composed of different alloys. Up to 1964, quarters (as well as dimes, halves, and dollars prior to 1935) were made of an alloy of 90% silver and 10% copper. Rising silver prices forced the mint to switch in 1965 to a "sandwich" composed of outer layers of 25% nickel and 75% copper bonded to a core of pure copper. From 1965 to 1969 half dollars still had a small amount of silver in them but in 1971 they were changed to the same sandwich metals. Dollars were also made the same way until 2000, when the current gold-colored brass metal was used.
The 2006 quarter is composed of a core of pure copper with outer layers of copper-nickel. If there was truly no copper then there would be no coin. If the usual copper line is missing from the edge of the quarter it is not because there is no copper in it but because as the blank quarter was stamped out of the sheet of metal, the outer layers containing the nickel were "smeared" over the edge of the blank quarter by the cutting die and concealing the customary copper band. Scraping the edge of the coin would reveal the copper.
A quarter is primarily made of a cupronickel alloy, which is a combination of copper and nickel. The core of the modern quarter is made of pure copper.