Stilbite
Stilbite , noun
[Greek {not transcribed} to glitter, shine: compare French stilbite.]
(Mineralogy) A common mineral of the zeolite family, a hydrous silicate of alumina and lime, usually occurring in sheaflike aggregations of crystals, also in radiated masses. It is of a white or yellowish color, with pearly luster on the cleavage surface. Called also desmine.