underthescopemineral: Osumilite-(Mg) KMg2(Al5Si10)O30Locality:Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany Field of View: 1.5 mm Dichroitic dark blue/light blue crystals of osumilite-Mg in a vug of a xenolith.

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underthescopemineral: Osumilite-(Mg) KMg2(Al5Si10)O30Locality:Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany Field of View: 1.5 mm Dichroitic dark blue/light blue crystals of osumilite-Mg in a vug of a xenolith.

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