Copper coins are very rare after 402, although minted silver and gold coins from hoards indicate they were still present in the province even if they were not being spent.

If Gold Silver Copper Standard is involved, expect gold to be even more powerful, while silver still has its own powers.

Copper plated with nickel and gold is often used.

The metals suitable for wire, possessing almost equal ductility, are platinum, silver, iron, copper, aluminium and gold ; and it is only from these and certain of their alloys with other metals, principally brass and bronze, that wire is prepared ( For a detailed discussion on copper wire, see main article: Copper wire and cable.

* Copper alloys used by Egyptians and Sumerians ; smelting of gold and silver known.

Copper wires in a cable may be bare, or they may be plated with a thin layer of another metal, most often tin but sometimes gold, silver or some other material.

Copper colour identifies low value ; gold colour identifies medium value ; two different metals identify high value.

Bisbee was founded as a copper, gold, and silver mining town in 1880, and named in honor of Judge DeWitt Bisbee, one of the financial backers of the adjacent Copper Queen Mine.

Copper, silver and gold are in group 11 of the periodic table, and they share certain attributes: they have one s-orbital electron on top of a filled d-electron shell and are characterized by high ductility and electrical conductivity.

Copper is one of the most important constituents of carat silver and gold alloys and carat solders used in the jewelry industry, modifying the color, hardness and melting point of the resulting alloys.

Copper oxides produce green or bluish green, cobalt makes deep blue, and gold produces wine red and violet glass.

Copper is one of three elements that are not silver or gray in color, along with caesium and gold.

Copper wire has the ability of being used at smaller diameters providing the same performance as gold without the high material cost.

Copper wire does pose some challenges in that it is harder than both gold and aluminum, so bonding parameters must be kept under tight control.

Copper is also harder than gold, which makes damage to the surface of the chip more likely.

Thebes used Nubian gold or Nub from her conquests south into Kush to facilitate the purchase of Frankincense, Myrrh, Bitumen, Natron, Juniper oil, Linen, and Copper amulets for the mummification industry at Karnak.

Copper may be added to lower gold proportion, chromium to compensate for loss of corrosion resistance, and boron for improving wetting impaired by the chromium.

Copper and lead have been the main metals mined in the mountains and a brief gold rush occurred in the 18th century.

Copper was the principal metal produced, although other metals were also extracted, including silver and gold.

Copper was discovered in 1870, leading to settlements being founded with Australia's European and Asian gold rush immigrant arrivals.

Freeport-McMoRan Copper & Gold Inc., ( FMCG, ) often called simply Freeport, is the world's lowest-cost copper producer and one of the world's largest producers of gold.

As a partner of Hearst, Haggin, Tevis and Co., Hearst had interests in the Comstock Lode and the Ophir mine in Nevada, the Ontario silver mine in Utah, the Homestake gold mine in South Dakota ( his pursuit of which is dramatized in the HBO television series Deadwood ), and the Anaconda Copper Mine in Montana.

Bougainville Copper Ltd is an Australian copper, gold, and silver mining company that operates the Panguna open cut mine on the island of Bougainville in Papua New Guinea ( PNG ).

* Rio Tinto Copper – copper and byproducts such as gold, silver, molybdenum, and sulphuric acid ; future home of nickel operations if developed

* 1971 – Copper mines in Chile are nationalized.

* KGHM Polska Miedź – Copper mines and mills

Copper output has increased steadily since 2004, due to higher copper prices and the opening of new mines.

* Copper extraction and casting begins in the mines of Kansanshi in southernmost Africa, at the border of Zaire and Zambia.

The most notable of these operations included a series of open-pit copper mines near the town of Ruth, and a copper smelter in McGill, run by the Kennecott Utah Copper Corporation.

Copper was discovered between the Kennicott Glacier and McCarthy Creek in 1900, after which Kennecott mines, Kennecott Mining Company, and company town of Kennecott were created.

William K Reed & Thomas McCarty founded the Union Copper Mine ( and later the Keystone & Empire mines ).

With help from banker John D. Ryan, Amalgamated acquired two large competitors, and soon controlled all the mines of Butte, Montana, later becoming Anaconda Copper Company, fourth largest company in the world by the late 1920s.

Copper is extracted at grades as low as 0. 15 % to 0. 2 %, generally in massive open-pit mines in Chile, where the size of the resources and favorable metallurgy allows economies of scale.

Category: Copper mines in Germany

This mine was one of the most productive mines in the Copper Country.

* List of Copper Country mines

In July 1913, locals of the Western Federation of Miners called a general strike against all mines in the Michigan Copper Country.

Category: Copper mines in the United States

Category: Copper mines in Canada

He bought shares in eight Cornish copper mines and met Thomas Williams, the ‘ Copper King ’ of the Parys Mountain mines in Anglesey.

Copper, lead, bronze, and silver mines were exploited in Achaea, though production was not as great as the mines of other Roman-controlled areas, such as Noricum, Britannia, and the provinces of Hispania.

Category: Copper mines in the United States

*: Category: Copper mines in the United States

Category: Copper mines in Chile

Category: Copper mines in Wales

Gerard's wife, Mary, was the daughter of copper magnate Marcus Daly, head of the Anaconda Copper Mining Company that developed the mines of Butte, Montana.