Scapolite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Scapolite

Scapolite's name is derived from Greek words meaning "rod" or "shaft" and "stone," which describes the shape of its crystals. Originally discovered in 1913 in the Mogok stone tract of upper Burma, scapolite has been found in many locations. However, it is typically found only in small pockets, leading to its status of rarity in the gemstone world. Scapolite is a mineral group of colorless, or translucent pink, orange, yellow, green, blue, violet or purple gemstones.

Colors

Colorless, Pink, Orange, Yellow, Yellowish Green (Rare), Blue, Violet, Violet-Blue, Purple, Rarely Red

  • Scapolite classification

    CommonName
    Scapolite
    Species
    Scapolite
    Variety
    Colors
    Colorless, Pink, Orange, Yellow, Yellowish Green (Rare), Blue, Violet, Violet-Blue, Purple, Rarely Red
    AlternateNames
    Marialite, Wernerite, Mizzonite, Meionite
    GemstoneGroups
    KeySeparations
    RI, birefringence, optic character and possible fluorescence. Uniaxial negative nature is the key to separate from uniaxial positive amethyst. The birefringence can be key when separating from beryl and labradorite.
    ClassificationComments
    Misnomer: pink moonstoneBirefringence typically 0.004 to 0.020 increases as RI increasesViolet or red stones: birefringence 0.005 to 0.020. Purple to violet stones: RI 1.536 to 1.541 birefringence commonly 0.005, SG: 2.60
  • Scapolite chemistry & crystallography

    ChemicalName
    sodium or calcium aluminum silicate carbonate chloride
    ChemicalFormula
    Na4Al3Si9O24Cl to Ca4Al6Si6O24(CO3, SO4)
    Synthesis
    CrystalSystem
    Tetragonal
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Scapolite optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    Strength: moderate fire Value: 0.017
    OpticalComments
    RefractiveIndex
    1.55-1.564
    Tolerance:(+0.015/-0.014)
    Birefringence
    0.004-0.038
    OpticCharacter
    Uniaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert to strong pink, orange or yellow
    LWUV: Inert to strong pink, orange or yellow
    CCFReaction
    Pleochroism
    Dichroic, moderate to strong, varying shades of body color
  • Scapolite characteristic physical properties

    Hardness
    6-6.5
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.6-2.74 Typical:2.68
    Toughness
    Fair
    Inclusions
    Scapolite often has hollow tubes or needle like crystals.
    Luster
    Vitreous
    Stability
    Fracture
    Conchoidal
    Cleavage
    Good, in two directions