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  2. Coin base weight - Wikipedia

    en.wikipedia.org/wiki/Coin_base_weight

    24, later 24 1 ⁄ 2 Gulden standard (9.5 grams of silver per Gulden) 34 Mark standard (6.9 grams of silver per Mark). The weight shown was the fine silver content in each case. This meant that the total weight of these coins could be higher due to the addition, especially of copper.

  3. Double Your Money Selling Old Pennies by the Pound

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

    At current copper prices, the melt value of older pennies is well over two cents. ... Currently, auctions are asking between $2 and $3 per pound for quantities of 10 to 25 pounds of coins. One ...

  4. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    This is a list of prices of chemical elements.Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison.

  5. Coins of the Australian dollar - Wikipedia

    en.wikipedia.org/wiki/Coins_of_the_Australian_dollar

    For many years there were also 2c and 1c coins, traditionally called "copper" coins, although they are actually an alloy of copper and zinc. The "silver" 5c, 10c, and 20c coins can be counted by value using their weight, without the need to count the individual pieces, as they have the same weight per value, at 0.565g per cent, or 56.5g per dollar.

  6. Denarius - Wikipedia

    en.wikipedia.org/wiki/Denarius

    The basic copper coin, the as, was to weigh 1 Roman pound. This was a large cast coin, and subdivisions of the as were used. The "pound" (libra, etc.) continued to be used as a currency unit, and survives e.g. in the British monetary system, which still uses the pound, abbreviated as £. 211 BC: Introduction: 4.55 g: 95–98%: 1 ⁄ 72 pound.

  7. Copper mining in the United States - Wikipedia

    en.wikipedia.org/wiki/Copper_mining_in_the...

    Copper mining activity increased in the early 2000s because of increased price: the price increased from an average of $0.76 per pound for the year 2002, to $3.02 per pound for 2007. [2] A number of byproducts are recovered from American copper mining.

  8. Copper - Wikipedia

    en.wikipedia.org/wiki/Copper

    According to the International Resource Panel's Metal Stocks in Society report, the global per capita stock of copper in use in society is 35–55 kg. Much of this is in more-developed countries (140–300 kg per capita) rather than less-developed countries (30–40 kg per capita). In 2001, a typical automobile contained 20–30 kg of copper. [41]

  9. Nickel (United States coin) - Wikipedia

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

    This made the new coin heavy, in terms of weight per $.01 of face value, compared to the three-cent copper-nickel coin. The bill passed without debate on May 16, 1866. [ 16 ] The new copper-nickel coin was legal tender for up to one dollar and would be paid out by the Treasury in exchange for coin of the United States, excluding the half cent ...

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