Meaning of stilbite

stil•bite

Pronunciation: (stil'bīt), [key]
— n.
  1. a white-to-brown or red zeolite mineral, a hydrous silicate of calcium and aluminum, occurring in sheaflike aggregates of crystals and in radiated masses.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.