1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone mineral 5) Gemstone 6) Iron mineral 7) Jewel 8) Jewel mineral 9) Mineral jewel 10) Mineral gemstone 11) Monoclinic mineral 12) Polished jewel 13) Polished mineral 14) Precious gemstone 15) Prized stone 16) Precious jewel 17) Prized mineral
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https://www.crosswordclues.com/clue/glaucophane
Glaucophane is the name of a mineral and a mineral group belonging to the sodic amphibole supergroup of the double chain inosilicates, with the chemical formula ☐Na2(Mg3Al2)Si8O22(OH)2 Glaucophane crystallizes in the monoclinic system. ==Name== Glaucophane is named for its typical blue color. In Greek, glaucophane means `blue appearing`. As th.....
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http://en.wikipedia.org/wiki/Glaucophane
• (n.) A mineral of a dark bluish color, related to amphibole. It is characteristic of certain crystalline rocks.
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http://thinkexist.com/dictionary/meaning/glaucophane/
common amphibole mineral, a sodium, magnesium, and aluminum silicate that occurs only in crystalline schists formed from sodium-rich rocks by ... [2 related articles]
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http://www.britannica.com/eb/a-z/g/37
Glau'co·phane noun [ Greek
glayko`s silvery, gray +
fai`nesqai to appear.]
(Min.) A mineral of a dark bluish color, related to amphibole. It is characteristic of certain crystalline rocks.
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http://www.encyclo.co.uk/webster/G/31
Glaucophane is a dark-blue sodium rich rock forming mineral which, like other amphiboles, is poor in silica. It is of interest to petrologists in helping to define the metamorphic conditions which formed the surrounding rock. It has the formulae Na2(Mg,Fe)3Al2Si8O22(OH)2 and a relative hardness of 7. It often has a blue colour.
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http://www.probertencyclopaedia.com/browse/HG.HTM
glaucophane A mineral of a dark bluish color, related to amphibole. It is characteristic of certain crystalline rocks.
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http://www.wordinfo.info/words/index/info/view_unit/916/
a sodium-rich monoclinic mineral of the amphibole family, usually metamorphic.
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https://www.infoplease.com/dictionary/glaucophane
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