Chondrodite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Chondrodite

Chondrodite, named for the Greek word for grain, "chondros," is a member of the humite group of minerals. Its gemmy hues range from red to yellow to orange, with the latter resembling the color of spessartite garnet. It can be found in several places including New York, Burma, Tanzania, and Afghanistan.

Colors

Red, Reddish Brown, Orange-Brown, Yellow, Gray-Green

  • Chondrodite classification

    CommonName
    Chondrodite
    Species
    Chondrodite
    Variety
    Colors
    Red, Reddish Brown, Orange-Brown, Yellow, Gray-Green
    AlternateNames
    GemstoneGroups
    Humite
    KeySeparations
    RI and birefringence
    ClassificationComments
    Some of the best specimens come from the Tilly Foster Mine in Brewster, NY and the Cardiff uranium mine in Wilberforce, Ontario, Canada. Gemstones often have a granular appearance.
  • Chondrodite chemistry & crystallography

    ChemicalName
    ChemicalFormula
    (Mg,Fe2+)5[F, OH)2/SiO4)2]
    Synthesis
    CrystalSystem
    Monoclinic
    ChemistryClassification
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Chondrodite optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    1.592-1.646
    Birefringence
    0.028-0.034
    OpticCharacter
    Biaxial
    OpticSign
    Positive
    PolariscopeReaction
    Fluorescence
    SWUV: inert to yellow or brownish-orange
    LWUV: inert to weak orange
    CCFReaction
    Pleochroism
    Dichroic, moderate orange-brown and yellow-brown
  • Chondrodite characteristic physical properties

    Hardness
    6-6.5
    CharacteristicComments
    Streak
    Yellow To Brown
    SpecificGravity
    3.1-3.26 Typical:3.2
    Toughness
    Poor
    Inclusions
    Luster
    Vitreous
    Stability
    Fracture
    Uneven
    Cleavage
    None