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Naujakasite: Na6(Fe++,Mn)Al4Si8O26 Villiaumite: NaF
Comments: Greenish-gray crystals of naujakasite with red villiaumite.
Location: Narsaq river, Kvanefjeld Mt., Ilímaussaq massif, Greenland.
Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag