Description

Larvikite is a monzonitic Feldspar rock in the Feldspar family which places it in the triclinc system. It contains Nepheline Syenite, Plagioclase, Perthite, Anorthoclase, Anorthite, Ortholclase, and Albite (basically plutonic rocks).

It is generally a dark grey, dark blue, or black in its coloring. It usually has Nepheline (a characteristic mineral of alkaline plutonic rocks) or Quartz inclusions. Its name has come from the place where this one is found in the Larvik Region of Norway.

Sometimes it is called Black Moonstone (I was guilty of that), even though it’s not actually a moonstone. It is also called Birds Eye Granite, Pearlspar, Blue Pearl, Emerald Pearl, Norwegian Pearl Granite, or Blue Norwegian Moonstone.