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Karnasurtite-(Ce): (Ce,La,Th)(Ti,Nb)(Al,Fe+++)(Si,P)2O7(OH)4·3(H2O) (?)
Comments: Tabular, hexagonal crystals of light-yellow karnasurtite-(Ce) associated with light-lilac porcelaneous polylithionite and black dendrites of a cryptomelane group mineral. Location: Hackmanite Stock (Pegmatite No. 62), Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Specimen Size is 5.5x5x2 cm. © Pavel M. Kartashov