Bornite

Bornite, also known as peacock ore, is a sulfide mineral with chemical composition Cu5FeS4 that crystallizes in the orthorhombic system (pseudo-cubic). ==Appearance== Bornite has a brown to copper-red color on fresh surfaces that tarnishes to various iridescent shades of blue to purple in places. Its striking iridescence gives it the nickname peac...
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Bornite

• (n.) 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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bornite

peacock ore noun a mineral consisting of sulfides of copper and iron that is found in copper deposits
Found on https://www.encyclo.co.uk/local/20974

Bornite

Bor'nite noun [ Named after Von Born , a mineralogist.] (Min.) 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.
Found on http://www.encyclo.co.uk/webster/B/81

bornite

a copper-ore mineral, copper and iron sulfide (Cu5FeS4). Typical occurrences are found in Mount Lyell, Tasmania; Chile; Peru; and Butte, Mont., U.S. ... [1 related articles]
Found on http://www.britannica.com/eb/a-z/b/95

Bornite

Bornite, named after the mineralogist Von Born, is a valuable ore of copper, containing copper, iron, and sulphur. Bornite has the formulae Cu5FeS4 and a relative hardness of 3. It is a widely occurring mineral found in basic rocks and metamorphic deposits.
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bornite

[n] - a mineral consisting of sulfides of copper and iron that is found in copper deposits
Found on http://www.webdictionary.co.uk/definition.php?query=bornite
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