State quarter errors are mistakes made on coins from the U.S. Mint's state quarter series, which was launched in 1999. Types of state quarter errors include missing design features, improper coatings, wrongly sized coins... More »

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Collectible state quarters are widely circulated and are often given back as change at stores and from vending machines. They can also be requested from some banks. Many private sellers also offer partial and full collec... More »

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It is not possible to determine the average value of a state quarter with a mint error accurately. Each error type and/or individual error is unique with regard to the error's amount of detail, the degree of damage to th... More »

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The Northern Mariana Islands quarter is part of the 2009 District of Columbia and U.S. Territories series issued by the U.S. Mint. The quarter has the same face value as any other quarter, but may hold a slightly higher ... More »

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The last minted quarter made of silver was produced by the U.S. Mint in 1966 in accordance with the Coinage Act of 1965. The first clad quarters, containing no silver, were minted in August 1965. More »

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The United States quarter is one-sixteenth of an inch thick and weighs 0.2 ounces, according to the U.S. Mint. The obverse (heads) bears the image of President George Washington, while the reverse (tails) depicts alterna... More »

Information about current, circulating or collectible U.S. coins is available through the U.S. Mint. The Numismatic Guaranty Corporation offers value and price guides for rare, retired and collectible coins as well as co... More »

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