Azurmalachite Gemstone & Information | Gemopedia by JTV | Gemopedia™

This trade name refers to a natural mixture of azurite and malachite that is often banded and can be used as both a gemstone or in decorative items. The bold greens and blues beautifully intertwine to form unique mineral specimens or gems, each piece always one-of-a-kind.
Colors
Blue, Green Banded Material
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Azurmalachite classification
CommonNameAzurmalachiteSpeciesAzurite, MalachiteVarietyColorsBlue, Green Banded MaterialAlternateNamesGemstoneGroupsKeySeparationsAppearance, RI, birefringence.ClassificationCommentsSince this stone is a combination of azurite and malachite it displays properties of both stones. RI: azurite 1.730 to 1.836 / malachite 1.655 to 1.909. Birefringence: azurite 0.106 / malachite 0.254. SG: azurite 3.80 (+0.09/-0.50) / malachite 3.95 (+0.15/-0.70) -
Azurmalachite chemistry & crystallography
ChemicalNamecopper carbonate hydroxideChemicalFormulaCu3(CO3)2(OH)2 and Cu2Co3(OH)2SynthesisCrystalSystemMonoclinicChemistryClassificationCarbonateNatureNaturalCrystallinityAggregateChemistryComments -
Azurmalachite optical properties
TransparencyOpaqueDispersionOpticalCommentsRefractiveIndexOver The Limit 1.655-1.909
Tolerance:(+0.010/-0.010)Birefringence0.106-0.254OpticCharacterBiaxialOpticSignPositivePolariscopeReactionAggregate (AGG)FluorescenceSWUV: Inert
LWUV: InertCCFReactionPleochroismNone -
Azurmalachite characteristic physical properties
Hardness3.5-4CharacteristicCommentsStreakLight Blue To Light GreenSpecificGravity3.7-3.95 Typical:3.8ToughnessPoorInclusionsAzurmalachite displays botryoidal growth or circular growth in green and blue. If the stone is stabilized it will appear compressed and have signs of polymer.LusterVitreousStabilityPoorFractureConchoidal, UnevenCleavageNone