A rare zeolite mineral typically found in volcanic rocks, composed of silicate compounds.
Named after the botanist Johann Georg Gmelin (same person as the gmelina plant) in honor of his scientific contributions, following 19th-century mineralogy naming traditions.
Gmelinite is a zeolite, which means it has a porous structure that can trap molecules—these minerals are so good at filtering that they're used in cat litter and to purify water and air.
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