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

Tsavorite Garnet

Tsavorite is one of two green varieties of garnet, though arguably the more important of the two. Especially in smaller sizes, tsavorite creates competition for emerald because it is less included, rarely treated and more durable. Like some emerald and green tourmaline, tsavorite garnet owes its green hues to the presence of vanadium and chromium. First discovered in Tanzania in 1967 and a few years later in Kenya, tsavorite's name pays homage to the nearby Tsavo National Park.

Colors

Intense Green To Yellowish Green, Bluish Green

  • Tsavorite-garnet classification

    CommonName
    Tsavorite Garnet
    Species
    Grossularite
    Variety
    Tsavorite
    Colors
    Intense Green To Yellowish Green, Bluish Green
    AlternateNames
    GemstoneGroups
    Garnet
    KeySeparations
    refractive index, singly refractive nature, possibly magnification and fluorescence
    ClassificationComments
    Tsavorite is a variety characterized by a medium to dark green or yellowish green body color.
  • Tsavorite-garnet chemistry & crystallography

    ChemicalName
    calcium aluminum silicate
    ChemicalFormula
    Ca3Al2(SiO4)3
    Synthesis
    CrystalSystem
    Cubic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Tsavorite-garnet optical properties

    Transparency
    Transparent - Semitransparent
    Dispersion
    Strength: moderate fire Value: 0.028
    OpticalComments
    RefractiveIndex
    1.74-1.74
    Tolerance:(+0.020/-0.010)
    Birefringence
    0-0
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Singly Refractive (SR) With ADR
    Fluorescence
    SWUV: weak yellow-orange
    LWUV: Inert to weak orange
    CCFReaction
    Some stones may appear pink or red
    Pleochroism
    None
  • Tsavorite-garnet characteristic physical properties

    Hardness
    7-7.5
    CharacteristicComments
    Streak
    SpecificGravity
    3.57-3.73 Range:0.12/-0.04 Typical:3.61
    Toughness
    Good
    Inclusions
    Tsavorite garnet is a Type II clarity stone. Stones will sometimes have feathers, fingerprint inclusions, needles, asbestos fibers and small graphite platelets.
    Luster
    Vitreous
    Stability
    Good
    Fracture
    Conchoidal, Uneven
    Cleavage
    None