Shonkinite, Nepheline, Clinopyroxene Subgroup, K Feldspar, Biotite
Michelsberg Quarry, Katzenbuckel, Eberbach, Rhein-Neckar-Kreis, Karlsruhe Region, Baden-Württemberg, Germany
Coarse-grained nepheline-bearing shonkinite rock from Katzenbuckel, containing subhedral clinopyroxene phenocrysts (spotty olive-green), subhedral nepheline crystals (finely fissured pale-brown to colorless), K-feldspar (colorless), magnetite crystals (black opaque), and minor biotite (brown). Transmitted light digital image, width of image 2.5 ...
© Günter Grundmann, Detmold.