Gadolinite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Gadolinite

Ranging from green to brownish black in color, gadolinite is a mineral that counts Russia as one of its primary sources. Interestingly, gadolinite is prized for the two rare earth elements it contains: yttrium and cerium.

Colors

Black, Greenish Black, Brown, Green

  • Gadolinite classification

    CommonName
    Gadolinite
    Species
    Gadolinite
    Variety
    Colors
    Black, Greenish Black, Brown, Green
    AlternateNames
    GemstoneGroups
    KeySeparations
    OTL RI and appearance.
    ClassificationComments
    Might be radioactive.
  • Gadolinite chemistry & crystallography

    ChemicalName
    ChemicalFormula
    Y2Fe2+Be2(Si2O10) or (Ce,La, Nd,Y)2Fe2+Be2(Si2O10)
    Synthesis
    CrystalSystem
    Monoclinic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline to Aggregate
    ChemistryComments
  • Gadolinite optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: strong fire
    OpticalComments
    RefractiveIndex
    Over the Limit 1.77-1.82
    Birefringence
    0.01-0.04
    OpticCharacter
    Biaxial
    OpticSign
    Positive
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    None
  • Gadolinite characteristic physical properties

    Hardness
    6.5-7
    CharacteristicComments
    Streak
    White And Greenish Gray
    SpecificGravity
    4-4.65
    Toughness
    Poor
    Inclusions
    Luster
    Vitreous
    Stability
    Fracture
    Conchoidal, Splintery
    Cleavage
    None