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  2. Quarter (United States coin) - Wikipedia

    en.wikipedia.org/wiki/Quarter_(United_States_coin)

    The quarter, formally known as the quarter dollar, is a coin in the United States valued at 25 cents, representing one-quarter of a dollar. Adorning its obverse is the profile of George Washington , while its reverse design has undergone frequent changes since 1998.

  3. Coins of the United States dollar - Wikipedia

    en.wikipedia.org/wiki/Coins_of_the_United_States...

    The Quarter-Dollar, Half-Dollar and Dollar coins were issued in the copper 91.67% nickel 8.33% composition for general circulation and the Government issued six-coin Proof Set. A special three-coin set of 40% silver coins were also issued by the U.S. Mint in both Uncirculated and Proof.

  4. Bi-metallic coin - Wikipedia

    en.wikipedia.org/wiki/Bi-metallic_coin

    As well as circulating coins, where they are generally restricted to high-denomination coins, bi-metallic coins are often used in commemorative issues, often made of precious metals. For example, the only bi-metallic coin issued by the United States is the $10 Library of Congress commemorative, made of a gold ring around a platinum center.

  5. Coinage metals - Wikipedia

    en.wikipedia.org/wiki/Coinage_metals

    Coins may be composed of multiple metals using alloys, coatings, or bimetallic forms. Coin alloys include bronze, electrum and cupronickel.Plating, cladding or other coating methods are used to form an outer layer of metal and are typically used to replace a more expensive metal while retaining the former appearance.

  6. Ring cent - Wikipedia

    en.wikipedia.org/wiki/Ring_cent

    The ring cent or holey cent was a one-cent pattern coin first struck in various compositions and designs between 1850 and 1851 as part of an experiment on producing a cent with a reduced weight and diameter, as the rising price of copper had caused cents to cost more than their face value to produce.

  7. Washington quarter - Wikipedia

    en.wikipedia.org/wiki/Washington_quarter

    According to coin dealer and numismatic historian Q. David Bowers, the Houdon bust, even then, was the most common representation of Washington on coins and medals. [5] Little is known of Flanagan's creative process, although models of Flanagan's quarter with a different portrayal of Washington, facing right, and with a different eagle, have ...

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