Elevate the mood in any room with a museum-quality display of our zeolite collection. Named by a Swedish mineralogist in 1756, these naturally occurring minerals form when volcanic rocks and ash react with groundwater. Stilbite and apophyllite are the most common, but our variety packs may also include chalcedony, stellerite, heulandite and others. Opulent colors range from white, pale yellow, earthy brown, pink, red, green, blue or black. Each stone is gem grade in an eye-catching formation. Size, color & formation vary.