Perthite (Var: Cryptoperthite)
Kjela, Yxney, Østerøya, Sandefjord, Vestfold, Norway
Bluish-colored schillerizing microcline feldspar, socalled "Moonstone" in situ. From a pegmatite vein at Kjela, close to Strandvika, Yxney, Østerøya, Sandefjord. These are quite commonly found in the coarse grained syenite pegmatites found in the Permian igneous rock larvikite in the Pluton IV of the Larvik Plutonic Complex.
The lens cap is ...
© Knut Edvard Larsen