zoisite Hear it!

zoisite definition

zois·ite (zo̵i′sīt′)

noun

a hard, glassy, orthorhombic mineral, CaAlSiO(OH), often used as a gem; hydrous calcium aluminum silicate
cf. tanzanite

Etymology: Ger zoisit, after Baron Zois von Edelstein (1747-1819), its discoverer

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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