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  2. Dollar coin (United States) - Wikipedia

    en.wikipedia.org/wiki/Dollar_coin_(United_States)

    The gold dollar weighing 1.672 g produced from 1849 to 1889 in 90% gold 10% copper. 1849 to 1853 gold dollar coins were 13 mm across and are called Type I. Type II gold dollars were thinner but larger at 15 mm diameter and were produced from 1854 to 1855. The most common gold dollar is the Type III, struck from 1856 until 1889.

  3. Double eagle - Wikipedia

    en.wikipedia.org/wiki/Double_eagle

    The coins are 34 mm × 2 mm and are made from a 90% gold (0.900 fine or 21.6 kt) and 10% copper alloy and have a total weight of 1.0750 troy ounces (1.1794 oz; 33.44 g). The eagle , half eagle , and quarter eagle were defined by name in the Act of Congress originally authorizing them. [ 2 ]

  4. American Gold Eagle - Wikipedia

    en.wikipedia.org/wiki/American_Gold_Eagle

    Because the term "eagle" also is the official United States designation for the pre-1933 ten dollar gold coin, the weight of the bullion coin is typically used when describing American Gold Eagles (e.g., "1/2-ounce American Gold Eagle") to avoid confusion with the pre-1933 coins. This is particularly true with the 1/4-oz American Gold Eagle ...

  5. 5 Copper Coins Worth a Lot of Money - AOL

    www.aol.com/finance/5-copper-coins-worth-money...

    With few exceptions, copper coins in the U.S. mean one-cent pennies — usually those featuring Abraham Lincoln. The most valuable Lincoln penny is worth $2 million on the collectibles market, and ...

  6. 9 Rare American Coins That Are Worth a Lot of Money - AOL

    www.aol.com/9-rare-american-coins-worth...

    Made of 95% copper and 5% tin and zinc alloy, it sold for $1.7 million in 2010 but is valued at $2.3 million in mint uncirculated condition. 1913 Liberty Head Nickel: $4.2 million

  7. United States Mint coin sizes - Wikipedia

    en.wikipedia.org/wiki/United_States_Mint_coin_sizes

    [1] Seven distinct types of coin composition have been used over the past 200 years: three base coin alloys, two silver alloys, gold, and in recent years, platinum and palladium. The base metal coins were generally alloys of copper (for 2 cent coins and lower), and copper/nickel (for 3 and 5 cent coins). Copper/nickel composition is also used ...

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