noun glau·co·phane \ˈglȯkəˌfān\

Definition of glaucophane



  1. :  a mineral Na2(Mg,Fe)3Al2Si8O22(OH)2 consisting of a blue, bluish black, or grayish silicate of sodium, aluminum, iron, and magnesium occurring in certain crystalline schists

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Origin and Etymology of glaucophane

German glaukophan, from glauk- glauc- + -phan -phane

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a rounded knoll or a ridge of ice

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