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Copper is known for its metallic reddish-brown color. Though not a gemstone or precious metal, it is included here in this guide for its historical significance as an ancient metal. Ornaments, coins, and statues have been fashioned from Copper since ancient times. Its distinct color and availability throughout history have afforded it great significance, though in modern times Copper is almost exclusively an industrial metal. |
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Copper is notorious for its habit of developing a green oxidation
tarnish on exposed surfaces, which is caused by exposure to
weathering. If kept away from water and moisture, it will not
tarnish. The green tarnish is sometimes known as patina, especially
when referring to historic statues and objects where the antique nature
is enhanced by tarnish.
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Virtually all mined Copper goes towards electrical and plumbing use. Copper has always been important in coin minting, and continues to remain a standard in coins. (Prior to 1983, the U.S. penny was made mostly of copper, but it is now made entirely from zinc and only plated with copper.) Copper, as well as brass and bronze, are fashioned into utensils, ornaments, and statues, but are rarely used in jewelry. Care must be exerted with Copper ornaments to prevent oxidization. They should be stored away from humid areas, and if washed they should be dried immediately.
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The main copper producing countries by output are Chile, the U.S. (Michigan and Arizona), Peru, China, Australia, Indonesia, Russia, Canada (Ontario and British Columbia), Zambia, Poland, and Kazakhstan.
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Copper is unique in color; no metal has the same color. Brass and bronze, both copper alloys, are not as brightly colored as copper, and they don't oxidize like Copper.
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Have a question about Copper? Visit our Q&A Community and ask the experts!
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