Wöhlerite, Biotite, Microcline
Risøya, Porsgrunn, Telemark, Norway
A sample showing, on the left hand side, a part of a wöhlerite-rich syenite pegmatite, and on the right hand side, the host rock, a larvikite. The wöhlerite occurs richly in this dm-thick syenite pegmatite vein as honey-yellowish platy crystals frozen in matrix. Pegmatite matrix: white-greyish feldspar (microcline), greyish= nepheline and black ...
© Knut Edvard Larsen