Osumilite-(Mg)
KMg2(Al5Si10)O30
Locality:
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.
Volker Betz’s Photo
Osumilith-(Mg) the Mg analogue of Osumilite. Osumilith- (Mg) forms at 900 ° C at high temperatures and is found in siliceous rocks, which have been metamorphically overburdened by hot alkaline magma or under conditions of the lower earth crust.
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