1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone 5) Gemstone mineral 6) Jewel mineral 7) Jewel 8) Mineral 9) Mineral jewel 10) Mineral gemstone 11) Peacock ore 12) Polished mineral 13) Polished jewel 14) Precious stone 15) Precious gem 16) Prized mineral 17) Precious jewel 18) Precious gemstone
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https://www.crosswordclues.com/clue/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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http://en.wikipedia.org/wiki/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.
Found on
http://thinkexist.com/dictionary/meaning/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
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, 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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http://www.probertencyclopaedia.com/browse/HB.HTM
[
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
Copper suphide ore.
Found on
https://copperalliance.org.uk/about-copper/copper-glossary/
Copper-iron sulphide ore.
Found on
https://oldcopper.org/special_topics/glossary.php
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
(Copper Iron Sulfide) Bornite is an important copper ore mineral. It ranks up there with many of the other copper ores such as chalcocite , chalcopyrite , covellite , digenite , cuprite and tetrahedrite . As a mineral specimen, bornite is usually lacking. Good crystals are rare and thus bornite is commonly known as simply a...
Found on
https://www.encyclo.co.uk/local/23719
a common mineral and important ore of copper, copper iron sulfide, CuFeS, occurring in masses, of brownish color when first exposed to the air; peacock ore.
Found on
https://www.infoplease.com/dictionary/bornite
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