Clinozoisite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Named for its resemblance to zoisite, clinozoisite is a colorless to pale grayish-yellow to green-colored mineral ideal for faceting. This gem was first discovered in Austria 1896, but there are many locations world wide where specimens have been found.
Colors
Colorless, Yellow, Yellow-Brown, Greenish, Pink
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Clinozoisite classification
CommonNameClinozoisiteSpeciesClinozoisiteVarietyColorsColorless, Yellow, Yellow-Brown, Greenish, PinkAlternateNamesGemstoneGroupsEpidoteKeySeparationsRI, birefringence and optic characterClassificationComments -
Clinozoisite chemistry & crystallography
ChemicalNamecalcium aluminum silicate hydroxideChemicalFormulaCa2Al3(SiO4)3(OH)SynthesisCrystalSystemMonoclinicChemistryClassificationSilicateNatureNaturalCrystallinityCrystallineChemistryComments -
Clinozoisite optical properties
TransparencyTransparent - TranslucentDispersionOpticalCommentsRefractiveIndex1.67-1.734Birefringence0.01OpticCharacterBiaxialOpticSignPositivePolariscopeReactionDoubly Refractive (DR)FluorescenceSWUV: Inert
LWUV: InertCCFReactionPleochroismUnobservable -
Clinozoisite characteristic physical properties
Hardness6-7CharacteristicCommentsStreakWhite To GraySpecificGravity3.21-3.38ToughnessPoorInclusionsLusterVitreousStabilityFractureUnevenCleavagePerfect, in one direction