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Gerasimovskite: (Mn,Ca)(Nb,Ti)5O12·9(H2O) (?) Ussingite: Na2AlSi3O8(OH)
Comments: Pale tan gerasimovskite pseudomorphous after epistolite crystal, in purple ussingite.
Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species