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Zeolite Group

The Zeolite group of minerals includes over forty minerals including these gem-type minerals: Analcime, Barrerite, Chabazite, Epistilbite, Gmelinite-Na, Goosecreekite, Mordenite, Natrolite, Pollucite, Scolecite, Stellerite, Stilbite, Thomsonite and Yugawaralite. Most of these minerals are typically found only as very fine, radiating needles, cottony aggregates or radiating masses so gem quality crystals are somewhat rare. Some of them, such as Mordenite, Stilbite and Thomsonite are never found as gemmy crystals and are only available as cabochons.

The name Zeolite is from two Greek words meaning to boil and stone because they typically fuse together with swelling during development.