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  2. 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

  3. Coinage metals - Wikipedia

    en.wikipedia.org/wiki/Coinage_metals

    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. Cupronickel, a base metal alloy with varying proportions of copper and nickel, was introduced as a cheaper alternative for silver in ...

  4. 1943 steel cent - Wikipedia

    en.wikipedia.org/wiki/1943_steel_cent

    The copper cents differ from their steel counterparts in four ways: [7] Genuine 1943 copper cents will not be attracted to a magnet. Copper-plated steel cents will exhibit a strong magnetic attraction. Copper cents weigh 3.11 grams. Steel cents weigh 2.702 grams. The numeral 3 in 1943 has the same long tail as the steel cents.

  5. Double Your Money Selling Old Pennies by the Pound

    www.aol.com/news/2012-12-05-copper-pennies-old...

    Save the right penny, though, and it's worth more. Take a look on eBay (EBAY) and you'll find hundreds of listings for auctions selling pennies. ... an increasing number of people are trading dull ...

  6. Britannia metal - Wikipedia

    en.wikipedia.org/wiki/Britannia_metal

    For the first few years, [2] [9] [10] they were gold-plated bronze, then later (perhaps starting in the 1930s, [11] [12] [13] 1945, [14] or 1982/1983; [15] [16] [17] different sources disagree), they were made of britannia metal plated with copper then nickel silver then gold, except for three years during WWII, from 1942 to 1945, during which ...

  7. 5 Copper Coins Worth a Lot of Money - AOL

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

    The most valuable Lincoln penny is worth $2 million on the collectibles market, and many more are worth five or six figures. The value of copper coins, as in all coins, is based on scarcity and ...

  8. Plating - Wikipedia

    en.wikipedia.org/wiki/Plating

    Plating is a finishing process in which a metal is deposited on a surface. Plating has been done for hundreds of years; it is also critical for modern technology. Plating is used to decorate objects, for corrosion inhibition, to improve solderability, to harden, to improve wearability, to reduce friction, to improve paint adhesion, to alter conductivity, to improve IR reflectivity, for ...

  9. Tin sources and trade during antiquity - Wikipedia

    en.wikipedia.org/wiki/Tin_sources_and_trade...

    However, the only Bronze Age object from Central Europe whose tin has been scientifically provenanced is the Nebra sky disk, and its tin (and gold, though not its copper), is shown by tin isotopes to have come from Cornwall. [20] In addition, a rare find of a pure tin ingot in Scandinavia was provenanced to Cornwall. [21]