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Litvinskite: Na2([ ],Na,Mn)Zr[Si6O12(OH,O)6]
Comments: Dark cherry-red litvinskite in matrix. Location: Shkatulka pegmatite, Umbozero mine, Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag