marcasite Hear it!

marcasite definition

mar·ca·site (mär′kə sīt′)

noun

  1. an orthorhombic mineral, FeS, that is dimorphic with pyrite; iron sulfide
  2. this mineral cut and mounted on silver or other white metal to look like brilliants

Etymology: Fr marcassite < ML marcasita < Ar marqashītā < Pers marqashīshā

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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