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Chabazite-K: (K2,Ca,Na2,Mg)[Al2Si4O12]·6(H2O)
Comments: Minute colorless crystals of chabazite-K on matrix. Location: Tyul'bnyunuai River Valley, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 0.6 mm. © Jeff Weissman / Photographic Guide to Mineral Species