Color Change Fluorite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Color Change Fluorite

Fluorite crystals occur in white, black, clear, and various shades of every color in the rainbow. Color change fluorite is rare, but has been discovered, usually with a blue to purple change. To observe this natural phenomenon, view your gemstone interchangeably in natural and incandescent lighting environments.

Colors

Violet, Blue

  • Color-change-fluorite classification

    CommonName
    Color Change Fluorite
    Species
    Fluorite
    Variety
    Color Change Fluorite
    Colors
    Violet, Blue
    AlternateNames
    GemstoneGroups
    KeySeparations
    Color change, refractive index, specific gravity, color zoning and possibly cleavage
    ClassificationComments
    Color shift blue to violet or purple to reddish purple.
  • Color-change-fluorite chemistry & crystallography

    ChemicalName
    calcium fluoride
    ChemicalFormula
    CaF2
    Synthesis
    CrystalSystem
    Cubic
    ChemistryClassification
    Halide
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Color-change-fluorite optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    Strength: weak fire Value: 0.007
    OpticalComments
    RefractiveIndex
    1.434-1.434
    Tolerance:(+0.001/-0.001)
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Singly Refractive (SR)
    Fluorescence
    SWUV: Variable, but can be strong blue violet
    LWUV: Variable, but can be strong blue violet
    CCFReaction
    Pleochroism
    None
  • Color-change-fluorite characteristic physical properties

    Hardness
    4
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3-3.25 Typical:3.18
    Toughness
    Poor
    Inclusions
    Fluorite will sometimes have triangular negative crystals, mineral inclusions, color zoning, healing cracks 2-phase and 3-phase inclusions and liquid inclusions. Might have pits or scratches on surface.
    Luster
    Vitreous
    Stability
    Fair
    Fracture
    Conchoidal, Step-Like
    Cleavage
    Perfect, in four directions