Glaucophane meaning

glou'kə-fān'
A bluish-gray or bluish-black monoclinic mineral of the amphibole group.
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A blue to grayish-blue or bluish-black monoclinic mineral of the amphibole group. Glaucophane occurs as fibrous prisms in schists (especially blueschists) formed by the regional metamorphism of sodium-rich rocks. Chemical formula: Na2(Mg,Fe)3Al2Si8O22(OH)2.
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Origin of glaucophane

  • German Glaukophan Greek glaukos bluish gray Greek -phanēs appearing (from phainesthai, phan- to come to light, appear bhā-1 in Indo-European roots)
    From American Heritage Dictionary of the English Language, 5th Edition