What is Larvikite?
Larvikite is a variety of monzonite, notable for the presence of thumbnail-sized crystals of feldspar. It’s primarily found in the Larvik area of Norway, hence its name. Larvikite is often used as a decorative building material as well as a gemstone.
Larvikite is a unique gemstone that comes in shades of grey with blue or silver flashes. Its unique appearance and color make it a popular choice for countertops and decorative items, as well as jewelry like pendants and beads.
|Chemical Classification||Inorganic - Silicate|
|Color||Predominantly grey with blue or silver reflections.|
|Luster||Vitreous to pearly.|
|Occurrence||Primarily found in the Larvik Fjord region of Norway.|
|Formation||Formed during the cooling of magma chambers.|
|Mohs Hardness||6 - 6.5.|
|Specific Gravity||Approximately 2.55 - 2.75.|
|Diagnostic Properties||Blue to silver labradorescence.|
|Chemical Composition||Anorthoclase (Na,K)AlSi3O8 and Augite (Ca,Na)(Mg,Fe,Al)(Si,Al)2O6|
|Pleochroism||Not observable due to its opacity.|
|Optical Properties||Biaxial (+)|
|Refractive Index||Varies due to mixture of minerals|
|Birefringence||Varies due to mixture of minerals|
|2V angle||Measured: 58°|
|Dispersion||Not typically noted due to its opacity.|