Azurite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Azurite

Azurite is a copper carbonate mineral found in the oxidation zones of copper deposits and is considered a secondary ore of copper. Color ranges from light to dark blue, with medium to dark blue being more common. The intensity of its hues is what makes azurite a popular collector's stone. Azurite is commonly found in conjunction with malachite, a green copper carbonate mineral into which it slowly morphs. A mix of the two minerals is known as azurmalachite. Azurite is soft (3.5 on Mohs' scale) and opaque. When used in jewelry, it is usually seen in the form of cabochons or beads.

Colors

Dark Blue To Violet Blue

  • Azurite classification

    CommonName
    Azurite
    Species
    Azurite
    Variety
    Colors
    Dark Blue To Violet Blue
    AlternateNames
    Chessy Copper, Chessylite, Azure Stone
    GemstoneGroups
    KeySeparations
    RI, birefringence blink, appearance
    ClassificationComments
    Misnomers : blue malachite, copper lapis
  • Azurite chemistry & crystallography

    ChemicalName
    copper carbonate hydroxide
    ChemicalFormula
    Cu3(CO3)2(OH)2
    Synthesis
    CrystalSystem
    Monoclinic
    ChemistryClassification
    Carbonate
    Nature
    Natural
    Crystallinity
    Crystalline to Aggregate
    ChemistryComments
  • Azurite optical properties

    Transparency
    Semitranslucent - Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    Over The Limit 1.73-1.836
    Tolerance:(+0.010/-0.010)
    Birefringence
    0.106
    OpticCharacter
    Biaxial
    OpticSign
    Positive
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    Dichroic, moderate to strong dark blue and lighter blue
  • Azurite characteristic physical properties

    Hardness
    3.5-4
    CharacteristicComments
    Streak
    Light Blue
    SpecificGravity
    3.7-3.89 Typical:3.8
    Toughness
    Poor
    Inclusions
    Azurite sometimes displays botryoidial structure often with matrix and malachite inclusions.
    Luster
    Vitreous
    Stability
    Poor
    Fracture
    Conchoidal, Uneven
    Cleavage
    Perfect, in one direction