There are 33 names in this directory containing the search term copper. Clear results.
A type of brass made of 90-percent copper and 10-percent zinc that has a gold-like color.
A metal with low intrinsic value that is usually worth less than the coin. Examples of base metals used for coins are copper, nickel, tin, steel, and aluminum.
Bright and shiny coin with its original finish. A copper coin is one that has maintained it full original luster described. See also red.
A term used to describe the color of a copper or copper-plated coin that has less than 5-percent of its original color because of natural oxidation.
A term used to describe modern coins that have layers of copper-nickel surrounding a layer of copper in the middle. These are sometimes referred to as "sandwich coins."
A non-precious reddish-brown soft metal that has been traditionally used to strike lower denomination coins. Sometimes written using its chemical symbol of Cu for its Latin name cuprum.
Term used for copper coins struck before in the pre-Federal period (prior to 1792), half cents, and large cents.
Chemical symbol for copper. See also copper.
Any alloy of copper and nickel. See also copper-nickel.
An alloy of copper and nickel. See also copper-nickel.
An alloy of silver, gold and copper patented by Dr. William Wheeler Hubbell. Goloid consists of 1 part gold (about 3.6-percent), 24 parts silver (about 87.3-percent) and 2.5 parts copper (about 9.1%). Coins were not minted using goloid because they were indistinguishable from other silver coins and susceptible to undetectable counterfeiting.
A United States copper coin struck from 1793 through 1857 whose face value was one-half of one cent. See also bit.
A United States copper coins struck from 1793 to 1857 whose face value was one-cent. During its existence, large cents ranged in size from 23.5 mm in diameter to 29 mm. The size was reduced to 19 mm beginning in 1857.
A non-precious silvery-white metal that has been a used for coin production since the mid-19th century. United States coins have been alloyed with copper for strength and to keep the costs down. Sometimes written using its chemical symbol of Ni.
Sometimes referred to as "German silver," nickel silver is an alloy of 60- percent copper, 20-percent nickel, and 20-percent zinc. It is named because of its silvery appearance even though it does not contain any silver. Nickel silver had been used to strike European coins prior to the adaptation of the Euro.
A grayish soft metal made of 85-95 percent tin. For coin making, the balance of the alloy is usually copper but lead has been used in some poorer countries. When used as a coinage metal, the planchets are small to prevent bending. Pewter is not used in the United States.
A numismatic item with a rough or granular surface resulting from oxidation. Commonly used to describe old copper coins.
A term used to describe the color of a copper or copper-plated coin that maintains at least 95-percent of its original color.
A term used to describe the color of a copper or copper-plated coin that maintains between 5-percent and 95-percent of its original color because of natural oxidation.
An alloy of at least 75-percent gold with the balance of copper made to give the metal a rose or pinkish hue.
Fine, silky finish seen mostly on copper and nickel business strike coins. Almost no "cartwheel" effect is seen on coins with satin luster.
Five-cent coin minted from 1866 to 1883, was the first non-copper coin that did not contain precious metals.
Lincoln Cents struck from 1942-1945 were made using the copper reclaimed from shotgun shells gathered from the military training camps during World War II.
A clad coin whose outer layers are made from .80 silver and .20 copper surrounding an center core made from .209 silver and .791 copper. This gave the effective makeup of 40- percent silver and 60-percent copper. The only coins struck using this type of composition were Kennedy half dollars struck from 1965 until 1970.
An alloy of silver that contains 92.5-percent silver and the balance a non-precious metal, usually copper.
Five-cent coins struck during World War II with the composition 56-percent copper, 35-percent silver, and 9-percent manganese.