Pink Opal Gemstone & Information | Gemopedia by JTV | Gemopedia™
Natural pink opal has no play of color and is a mixture of opal, palygorskite and chalcedony. Nicknamed the 'pink Andes opal', the soft pinks of this opal are appreciated as an environmentally friendly alternative to conch pearls as well as pink coral. Today, Peru is the major producer of this most feminine opal variety that is often carved into beads and occasionally faceted into gems.
Pale Pink To Dark Pink
Pink-opal classificationCommonNamePink OpalSpeciesOpalVarietyPink OpalColorsPale Pink To Dark PinkAlternateNamesGemstoneGroupsKeySeparationsAppearance, RI and fluorescenceClassificationCommentsPink opal might have characteristics in between common opal and chalcedony because it can be composed of both materials.
Pink-opal chemistry & crystallographyChemicalNamehydrated silicon dioxide; opal, palygorskite and chalcedonyChemicalFormulaSiO2.nH2OSynthesisCrystalSystemNAChemistryClassificationSilicateNatureNaturalCrystallinityAmorphousChemistryComments
Pink-opal optical propertiesTransparencyTranslucent - OpaqueDispersionOpticalCommentsRefractiveIndex1.37-1.53BirefringenceOpticCharacterNAOpticSignNAPolariscopeReactionAggregate (AGG)FluorescenceSWUV: inert to strong green or yellowish green
LWUV: inert to strong green or yellowish greenCCFReactionPleochroismNone
Pink-opal characteristic physical propertiesHardness6CharacteristicCommentsStreakWhiteSpecificGravity1.98-2.55ToughnessVariesInclusionsLusterVitreousStabilityPoorFractureConchoidal, UnevenCleavageNone