MetaGlossary.com: Bornite

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Keywords: Tarnished, Sulfide, Copper, Purple, Erubescite

Related Terms: Arsenopyrite, Bauxite, Bismuth, Cassiterite, Chalcocite, Chalcopyrite, Cinnabar, Covellite, Dezincification, Ferric, Ferruginous, Galena , Gossan, Hematite, Ilmenite, Iron Oxide, Limonite, Magnetite, Manganese, Manganese Bronze, Manganite, Marcasite, Matte, Molybdenite, Octahedrite, Pyrite, Pyrolusite, Pyrrhotite, Rust, Rutile, Siderite, Sphalerite, Spiegeleisen, Stibnite, Sulphide, Tellurium, Thallium, Verdigris, Iron Oxides, Sulfide, Black Sand, Iron Meteorite, Kamacite, Fool's Gold, Iron Ore, Ferric Iron, Taconite, Refractory Ore, Haematite

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A valuable ore of copper, containing copper, iron, and sulphur; -- also called purple copper ore (or erubescite), in allusion to the colors shown upon the slightly tarnished surface.

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a mineral consisting of sulfides of copper and iron that is found in copper deposits

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Bornite is a copper ore mineral, containing 50% copper by atomic ratio.

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Copper sulphide ore.

http://cda.org.uk/Megab2/general/pub121/section9.htm

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Bornite is a sulfide mineral with chemical composition Cu5FeS4 that crystallizes in the cubic system. It has a brown to copper-red color on fresh surfaces that tarnishes to an iridescent purple surface. Its purple to bronze iridescence gives it the nickname peacock ore.

http://en.wikipedia.org/wiki/Bornite

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