Oxyphlogopite

Rothenberg, Bell, Mendig, Eifel, Rhineland-Palatinate, Germany

Oxyphlogopite is a fairly rare mica group mineral. It forms free standing brown  platy crystals up to few mm in association with magnetite octahedrons, white nepheline and brownish pyroxene microcrystals. From the Type Locality

The specimen size 3.6 cm x 3.2 cm x 2.0 cm 

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I’m a professional geologist/mineralogist, with analytical background. Many of my minerals were checked by x-ray diffraction and energy dispersive spectrometry. Some of my specimens comes with the documentation of the analysises.

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