a sodium-rich monoclinic mineral of the amphibole family, usually metamorphic.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use glaucophane in a sentence
glaucophane-eclogites have been met with in Italy and the Pennine Alps.
Other minerals which have been found in eclogites are bronzite, olivine and glaucophane.
Scientific definitions for glaucophane
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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.