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2. Penny (United States coin) - Wikipedia

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

   The predominantly zinc coins make a lower-pitched "clunk" when hitting the surface, and make no sound when flipped in the air; while the copper coins produce a higher-pitched ringing sound. [8] In addition, a full 50-cent roll of pre-1982/3 coins weighs 5.4 oz (150 g) compared to a post-1982–83 roll which weighs 4.4 oz (120 g).

3. Coinage metals - Wikipedia

   en.wikipedia.org/wiki/Coinage_metals

   This leads to the possibility of smelters taking coins and melting them down for the scrap value of the metal. Pre-1992 British pennies were made of 97% copper; but as of 2008, based on the price of copper, the value of a penny from this period is 1.5 new-pence. Modern British pennies are now made of copper-plated steel.

4. 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.

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

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

   But finding the right copper coin... Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in. Mail. 24/7 Help. For premium support please call

6. List of most expensive coins - Wikipedia

   en.wikipedia.org/wiki/List_of_most_expensive_coins

   List of most expensive coins Price Year Type Grade Issuing country Provenance Firm Date of sale $18,900,000 1933 1933 double eagle: MS-65 CAC United States: King Farouk of Egypt: Sotheby's [1] June 8, 2021 $12,000,000 1794 Flowing Hair dollar: SP-66 CAC United States Neil, Carter Private sale [2] January 24, 2013 $9,360,000 1787 Brasher ...

7. Dollar coin (United States) - Wikipedia

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

   The production of large numbers of U.S. gold coins (The first $1 and $20 gold coins were minted in 1849) from the new California mines lowered the price of gold, thereby increasing the value of silver. By 1853, the value of a U.S. silver dollar contained in gold terms, $1.04 of silver, equal to $38.09 today.