Charoite Gemstone & Information | Gemopedia by JTV | Gemopedia™
Charoite offers an intriguing, mystical array of patterns that are both eye-catching and mesmerizing. The patterns often exhibit a combination of swirls, veins and spots that give each piece a unique and magical appearance. The name Charoite is used to describe both a mineral and an attractive gem material primarily composed of charoite. The gem material comes from the remote, mountainous region of the Sakha Republic of Russia, which remains its only known source.
Purple With Swirls, Spots Of Black, Gray, White, Brownish Orange
Charoite classificationCommonNameCharoiteSpeciesCharoiteVarietyColorsPurple With Swirls, Spots Of Black, Gray, White, Brownish OrangeAlternateNamesGemstoneGroupsKeySeparationsAppearence, RI, and possibly fluorescenceClassificationCommentsConglomerate of charoite, aegirine-augite, feldspar and tinaksite and other materials that might give different RI readings.Often displays 1.55 or 1.56 spot reading.
Charoite chemistry & crystallographyChemicalNamehydrated potassium calcium sodium hydroxide fluorideChemicalFormula(K,Na)5(Ca,Ba,Sr)8(Si6O15)2Si4O9(OH,F).11H2OSynthesisCrystalSystemMonoclinicChemistryClassificationRockNatureNaturalCrystallinityAggregateChemistryComments
Charoite optical propertiesTransparencySemitranslucent - OpaqueDispersionOpticalCommentsRefractiveIndex1.55-1.559
Tolerance:(+0.002/-0.002)BirefringenceOpticCharacterBiaxialOpticSignPositivePolariscopeReactionAggregate (AGG)FluorescenceSWUV: Inert to patchy weak red
LWUV: Inert to patchy weak redCCFReactionPleochroismUnobservable
Charoite characteristic physical propertiesHardness5-6CharacteristicCommentsStreakWhiteSpecificGravity2.54-2.78 Typical:2.68ToughnessFairInclusionsCharoite has a fibrous or flame-like appearance with swirls and spots of black, gray, white or brownish orange.LusterVitreousStabilityFractureSplintery, GranularCleavageGood, in three directions