Larvikite Gemstone & Information | Gemopedia by JTV | Gemopedia™
Larvikite is a feldspar-rich igneous rock, called a monzonite and is named for the town in Norway where it was found. One characteristic of this stone is its unique iridescence, caused by the presence of interlocking feldspar crystals within the structure of the stone. Through the wonders of nature, each polished gem has a sheen that sparkles with deep silver tones. Usually, this stone is used in ornamental and decorative purposes.
Bluish Gray, Greenish Blue Gray, Sometimes with Golden Brown Overtone
Larvikite classificationCommonNameLarvikiteSpeciesLarvikiteVarietyColorsBluish Gray, Greenish Blue Gray, Sometimes with Golden Brown OvertoneAlternateNamesNorwegian Pearl Granite And Royal Blue Pearl GraniteGemstoneGroupsKeySeparationsAppearanceClassificationCommentsLarvikite comes from Larvik, Norway and is a igneous rock that contains mostly feldspar but can also contain olivine, titanian augite, titanian magnetite, apatite and quartz. Misnomers: blue granite or birds eye granite.Norwegian Pearl granite: lighter variety of lakvikite.Royal blue pearl granite: darker variety of lakvikite.
Larvikite chemistry & crystallographyChemicalNameChemicalFormulaSynthesisCrystalSystemNAChemistryClassificationRockNatureNaturalCrystallinityAggregateChemistryComments
Larvikite optical propertiesTransparencyTransparent - OpaqueDispersionOpticalCommentsRefractiveIndexBirefringenceOpticCharacterOpticSignPolariscopeReactionFluorescenceSWUV:
Larvikite characteristic physical propertiesHardness6-6.5CharacteristicCommentsStreakSpecificGravityTypical:2.59ToughnessInclusionsLarvikite displays the blue sheen or shiller effect which is caused by alternating alkali feldspar and plagioclase layers.LusterPearlyStabilityFractureCleavage