Uvarovite Garnet Gemstone & Information | Gemopedia by JTV | Gemopedia™

Uvarovite Garnet

Uvarovite is a highly desirable, yet widely unknown garnet species. Discovered in the 1830's in Russia, it was named in honor of Count Sergey S. Uvarov, a 19th century Russian statesman, scholar and avid mineral collector. Especially prized by collectors, uvarovite is hard to find anywhere, especially in sizes greater than 0.25 carats. Uvarovite ranges in color from medium to dark green and is best known for its granular, drusy masses which reveal well-formed dodecahedral or trapezohedral crystals under magnification.

Colors

Green, Yellow Green To Brownish Green

  • Uvarovite-garnet classification

    CommonName
    Uvarovite Garnet
    Species
    Uvarovite
    Variety
    Uvarovite Garnet
    Colors
    Green, Yellow Green To Brownish Green
    AlternateNames
    GemstoneGroups
    Garnet
    KeySeparations
    Appearance
    ClassificationComments
    Uvarovite garnet occurs as irregular aggregates of small tightly packed crystals on a rock matrix and has crystals to tiny to test RI.
  • Uvarovite-garnet chemistry & crystallography

    ChemicalName
    calcium chromium silicate
    ChemicalFormula
    Ca3Cr2(SiO4)3
    Synthesis
    CrystalSystem
    Cubic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Aggregate
    ChemistryComments
  • Uvarovite-garnet optical properties

    Transparency
    Opaque
    Dispersion
    Strength: weak fire Value: 0.014
    OpticalComments
    RefractiveIndex
    Over the Limit 1.798-1.864
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Singly Refractive (SR)
    Fluorescence
    SWUV: Variable
    LWUV: Variable
    CCFReaction
    Pleochroism
    None
  • Uvarovite-garnet characteristic physical properties

    Hardness
    6.5-7
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3.71-3.81
    Toughness
    Inclusions
    Luster
    Vitreous
    Stability
    Fracture
    Conchoidal, Uneven
    Cleavage
    None