a very hard, orthorhombic silicate of aluminum, Al2
, usually found in schist
, or other metamorphic rocks and used to make various high-temperature materials and
as a gem
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'andalusite'
, where it was discovered