Scheelite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Scheelite

Scheelite, named for Swedish chemist C.W. Scheele is a calcium tungstate, a major source of tungsten. Most scheelite is fluorescent and ranges from blue to white in color. Spectacular, transparent crystals come from Austria, Italy, Brazil, Rwanda, and Colorado. Scheelite crystals often have high luster and fire that is almost adamantine.

Colors

Colorless, Yellow, Orange, Brown

  • Scheelite classification

    CommonName
    Scheelite
    Species
    Scheelite
    Variety
    Colors
    Colorless, Yellow, Orange, Brown
    AlternateNames
    GemstoneGroups
    KeySeparations
    Moderate dispersion, strong fluorescence to SW and high SG
    ClassificationComments
    Thermoluminescent: phosphorescence caused by heating
  • Scheelite chemistry & crystallography

    ChemicalName
    calcium tungstate
    ChemicalFormula
    CaWO4
    Synthesis
    CrystalSystem
    Tetragonal
    ChemistryClassification
    Sulfate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Scheelite optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    Strength: moderate fire Value: 0.038
    OpticalComments
    RefractiveIndex
    Over The Limit 1.918-1.934
    Tolerance:(+0.003/-0.003)
    Birefringence
    0.016
    OpticCharacter
    Uniaxial
    OpticSign
    Positive
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert to strong light blue or yellow
    LWUV: Inert
    CCFReaction
    Pleochroism
    Unobservable
  • Scheelite characteristic physical properties

    Hardness
    4.5-5
    CharacteristicComments
    Streak
    White
    SpecificGravity
    5.9-6.12 Typical:6
    Toughness
    Poor
    Inclusions
    Luster
    SubAdamantine
    Stability
    Fracture
    Uneven, Subconchoidal
    Cleavage
    Good, in one direction, Poor, in one direction