Definitions for "Glaucophane"
A mineral of a dark bluish color, related to amphibole. It is characteristic of certain crystalline rocks.
Glaucophane is a mineral belonging to the amphibole group, chemical formula Na2(Mg,Fe)3Al2Si8O22(OH)2. It is named from its typical blue color (in Greek, glaucophane means "blue appearing"). Glaucophane crystallizes in the monoclinic system.