Sodalite-Single Crystal Gemstone & Information | Gemopedia by JTV | Gemopedia™

Sodalite-Single Crystal

Sodalite is a mineral used most often for carvings and some types of jewelry. Known for its rich, royal blue hues, sodalite is found in limited areas of the world. Frequently mottled with white veins of calcite, sodalite resembles lapis lazuli in appearance and has been mistaken for it at times. It can occur not only as blue, but also in crystals of gray, yellow, green or pink color.

Colors

Light To Dark Blue, Azure Blue, Colorless, White, Yellowish, Greenish, Gray, Pink

  • Sodalite-single-crystal classification

    CommonName
    Sodalite-Single Crystal
    Species
    Sodalite
    Variety
    Single-Crystal Sodalite
    Colors
    Light To Dark Blue, Azure Blue, Colorless, White, Yellowish, Greenish, Gray, Pink
    AlternateNames
    Hackmanite
    GemstoneGroups
    KeySeparations
    RI, SG, appearance and possibly fluorescence
    ClassificationComments
    Hackmanite is the pink variety of sodalite.
  • Sodalite-single-crystal chemistry & crystallography

    ChemicalName
    chloric sodium aluminum silicate
    ChemicalFormula
    Na8Al6Si6O24Cl2
    Synthesis
    CrystalSystem
    Cubic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Sodalite-single-crystal optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    Strength: moderate fire Value: 0.018
    OpticalComments
    RefractiveIndex
    1.483
    Tolerance:(+0.004/-0.004)
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Singly Refractive (SR)
    Fluorescence
    SWUV: moderate orange, green, or yellowish white
    LWUV: Inert to weak orange
    CCFReaction
    Pleochroism
    None
  • Sodalite-single-crystal characteristic physical properties

    Hardness
    5-6
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.15-2.4 Typical:2.25
    Toughness
    Poor
    Inclusions
    Transparent sodalite sometimes has small black inclusions.
    Luster
    Vitreous
    Stability
    Fracture
    Uneven
    Cleavage
    Poor, in one direction