Hypersthene Gemstone & Information | Gemopedia by JTV | Gemopedia™

Hypersthene

Hypersthene is a common mineral in the pyroxene group that rarely forms distinct crystals. Its name is from a Greek word meaning "over strength," referring to its hardness. It is usually brown, green or gray with vitreous to pearly luster and displays a brilliant coppery metallic surface sheen.

Colors

Bronze, Gray, Black, Whitish, Brown, Green

  • Hypersthene classification

    CommonName
    Hypersthene
    Species
    Enstatite
    Variety
    Colors
    Bronze, Gray, Black, Whitish, Brown, Green
    AlternateNames
    Enstatite, Ferroan Enstatite,
    GemstoneGroups
    Pyroxene
    KeySeparations
    RI, birefringence, optic character and spectrum
    ClassificationComments
    Misnomer: Hypersthene has been discredited by the CNMMN Pyroxene Subcommitee in 1988 and it is used as a synonym for enstatite or ferrosilite.
  • Hypersthene chemistry & crystallography

    ChemicalName
    magnesium iron silicate
    ChemicalFormula
    (Mg,Fe)2Si2O6
    Synthesis
    CrystalSystem
    Orthorhombic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline to Aggregate
    ChemistryComments
  • Hypersthene optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: weak fire
    OpticalComments
    RefractiveIndex
    1.673-1.731
    Birefringence
    0.01-0.016
    OpticCharacter
    Biaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: inert
    LWUV: inert
    CCFReaction
    Pleochroism
    Dichroic, strong bluish-green and brownish-red
  • Hypersthene characteristic physical properties

    Hardness
    5-6
    CharacteristicComments
    Streak
    White Or Gray
    SpecificGravity
    3.4-3.5 Typical:3.45
    Toughness
    Poor
    Inclusions
    Hypersthene displays a copper red schiller or sheen caused by tabular inclusions of hematite and goethite.
    Luster
    Vitreous
    Stability
    Fracture
    Uneven
    Cleavage
    Good, in one direction