In 2000 U.S. mines turned out 1.44 million metric tons of recoverable copper valued at $2.8 billion or approximately 11 percent of world production of 13.2 million metric tons.
3%
I know copper in the US does sell by the pound at $3.00 as of today
A 1994 US cent is zinc not copper, spend it.
Except for cents and dollars, modern coins are 75% copper.
Those are 95 percent copper. A US penny weighs 3.11 grams. Of that, 2.9545 grams is copper.
Penny
Copper pennies only have an external copper gilding. The US mint went to a copper coated zinc alloy many years ago.
solar produce us infinity engergy.
copper oxide, nitrogen and oxygen
The Royal Mint does not produce a "quarter" coin.
Copper is much cheaper but still does the same job almost as well as silver.
The approx. price of copper is 7100 US $/tonne (December 2013).