Enstatite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Enstatite

Enstatite occurs in a wide variety of colors ranging from reds and oranges, which are the most common, to yellows and greens, white, and colorless. This gem has been identified in meteorites, and is believed to be one of the early stages of crystalline silicate formation in space.

Colors

Dark Reddish Brown To Brownish Green

  • Enstatite classification

    CommonName
    Enstatite
    Species
    Enstatite
    Variety
    Colors
    Dark Reddish Brown To Brownish Green
    AlternateNames
    Bronzite If It Has Fibrous Inclusions
    GemstoneGroups
    Pyroxene
    KeySeparations
    RI, birefringence, optic character and spectrum
    ClassificationComments
    Hypersthene (Mg,Fe)2Si2O6 biaxial negative SG 3.45 (+/-0.05). Enstatite might show 6 rayed star or cat's-eye.
  • Enstatite chemistry & crystallography

    ChemicalName
    magnesium silicate
    ChemicalFormula
    Mg2Si2O6
    Synthesis
    CrystalSystem
    Orthorhombic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Enstatite optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: weak fire Value: 0.01
    OpticalComments
    RefractiveIndex
    1.663-1.673
    Tolerance:(+0.010/-0.010)
    Birefringence
    0.008-0.011
    OpticCharacter
    Biaxial
    OpticSign
    Positive
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: inert
    LWUV: inert
    CCFReaction
    Pleochroism
    Trichroic, strong pinkish red to brown, green, and yellow
  • Enstatite characteristic physical properties

    Hardness
    5-6
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3.23-3.4 Typical:3.25
    Toughness
    Poor
    Inclusions
    Cat's-eye enstatite will have black needle-like inclusions.
    Luster
    Vitreous
    Stability
    Fracture
    Uneven
    Cleavage
    Good, in one direction