Sapphirine Gemstone & Information | Gemopedia by JTV | Gemopedia™

Sapphirine

Sapphirine was so named because of its resemblance in color to blue sapphire, even though the two minerals have completely different chemical, optical and physical properties. Sapphirine is very rare, with small gems only faceted for collectors. This gem is know for blue color, but occasionally forms in a red-orange variety.

Colors

Dark Blue, Greenish, Pink, Violet, Orange-Red, Colorless

  • Sapphirine classification

    CommonName
    Sapphirine
    Species
    Sapphirine
    Variety
    Colors
    Dark Blue, Greenish, Pink, Violet, Orange-Red, Colorless
    AlternateNames
    GemstoneGroups
    KeySeparations
    RI and optic character.
    ClassificationComments
  • Sapphirine chemistry & crystallography

    ChemicalName
    magnesium aluminum silicate
    ChemicalFormula
    (Al,Mg)8(Al,Si)6O20
    Synthesis
    CrystalSystem
    Monoclinic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline to Aggregate
    ChemistryComments
  • Sapphirine optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    Strength: moderate fire Value: 0.019
    OpticalComments
    RefractiveIndex
    1.701-1.724
    Birefringence
    0.004-0.007
    OpticCharacter
    Biaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    Trichroic, strong, varying shades of body color
  • Sapphirine characteristic physical properties

    Hardness
    7.5
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3.4-3.58
    Toughness
    Inclusions
    Sapphirine is named for its similar appearance to sapphire.
    Luster
    Vitreous
    Stability
    Fracture
    Conchoidal
    Cleavage
    None