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Dmisteinbergite: CaAl2Si2O8 Wairakite: CaAl2Si4O12·2(H2O)
Comments: Pearly platy crystalline dmisteinbergite with dull white wairakite on matrix. Location: Kurumazawa, Katashina, Gumma, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species