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Tassieite: (Na,[ ])Ca2(Mg,Fe++,Fe+++)2(Fe+++,Mg)2(Fe++,Mg)2(PO4)6(H2O)2
Comments: Thin-section image in plane-polarized light of bluish gray tassieite in a band of alteration (abundant particles) cutting fluorapatite (Ap). Inset image illustrates cleavage.
Location: Granulite-facies paragneiss from Stornes Peninsula, Larsemann Hills, Pyrdz Bay, East Antarctica. (CanMin, v45:293).
Scale: See Image.
© Canadian Mineralogist