Medium-grained nepheline-syenite, variety “Lujavrite” from Ilímaussaq, consisting essentially of Arfvedsonite (olive-dark-green to almost black pleochroism), albite and K-felspar (colorless), minor aegirine (green), nepheline, tugtupite (colorless), and biotite (red-brown). Transmitted light digital image, width of image 3 cm.
Please ...
© Günter Grundmann, Detmold.