Sodalite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Sodalite

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

Dark Blue To Violet Blue With White Veining; Veining Can Be Yellow, Red, Rarely Gray, Greenish, Yellowish, White, Pink

  • Sodalite classification

    CommonName
    Sodalite
    Species
    Sodalite
    Variety
    Colors
    Dark Blue To Violet Blue With White Veining; Veining Can Be Yellow, Red, Rarely Gray, Greenish, Yellowish, White, Pink
    AlternateNames
    Canadian Blue Stone
    GemstoneGroups
    KeySeparations
    appearance, RI, SG and possibly fluorescence
    ClassificationComments
  • Sodalite chemistry & crystallography

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

    Transparency
    Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    1.483
    Tolerance:(+0.004/-).004)
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Aggregate (AGG)
    Fluorescence
    SWUV: moderate orange, green, or yellowish white
    LWUV: moderate to strong orange, yellowish white, or red
    CCFReaction
    Pleochroism
    None
  • Sodalite characteristic physical properties

    Hardness
    5-6
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.15-2.4 Typical:2.25
    Toughness
    Poor
    Inclusions
    Sodalite usually has white calcite patches and veins. Stones lack pyrite inclusions unlike lapis.
    Luster
    Vitreous
    Stability
    Fracture
    Uneven
    Cleavage
    Poor, in one direction