Lévyne-Ca

Formula: (Ca,Na2,K2)[Al2Si4O12]·6H2O From Alfredo Petrov: LEVYNE-Ca (kai-rebi-fusseki) Above: Colourless hexagonal crystals of lévyne-Ca from Kuniga, Nishinoshima, Oki Islands, Okinoshima, Oki District, Shimane Prefecture, Japan. Width of view 3mm. Elsewhere on the specimen lévyne-Ca occurs as yellow iron-stained crystals, white fibrous thomsonite, and tiny analcime crystals. Ex Peter Hall. Ex Hiromi...