|Name:||After the town of Larvik in Norway, where it was described from.|
Larvikite is an igneous rock, a variety of the rock monzonite. It is noted for it's interlocking crystals of feldspar. The feldspar is perthitic, and the alternating alkali feldspar and plagioclase layers give these crystals their characteristic silver blue sheen (or Schiller effect) on polished surfaces. Olivine
can be present along with titanian augite
, titanian magnetite
, and sometimes quartz
In the building Stone trade Larvikite with a greenish hue is called "Green Pearl" and that with a bluish hue is called "Blue Pearl".Visit gemdat.org for gemological information about Larvikite.
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(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
|| Michael O’Donoghue (2006) Gems, Sixth Edition, p. 282|
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