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Mountainite: (Ca,Na2,K2)2Si4O10·3(H2O) Raite: Na4Mn++4Si8(O,OH)24·9(H2O)
Comments: Bright white fibrous acicular mountainite crystal aggregate with pale golden raite.
Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species