stilbite

A white or yellow lustrous zeolite mineral, essentially (Ca,Na)₂Al₂Si₇O₁₈·7H₂O.

A common zeolitic mineral, usually occurring in radiated or sheaf-like tufts of crystals having a pearly luster on the surface of cleavage.

The mineral heulandite.

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.

A tectosilicate zeolite mineral consisting of hydrated calcium aluminium silicate, common in volcanic rocks.