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

Spessartite Garnet

While it was once just a collector's gem, spessartite, an orange variety of garnet, made its move into the mainstream during the 1990s when new deposits were discovered in Africa. Like most garnets, spessartite is typically untreated, so the beautiful color and clarity that you see in them is just as nature created it. Spessartite garnet is named after its first discovery in Spessart, Bavaria, in the mid 1800's.

Colors

Orange, Brownish Orange, Yellowish Orange, Reddish Orange, Red-Orange. Never Any Purple Component.

  • Spessartite-garnet classification

    CommonName
    Spessartite Garnet
    Species
    Spessartite
    Variety
    Colors
    Orange, Brownish Orange, Yellowish Orange, Reddish Orange, Red-Orange. Never Any Purple Component.
    AlternateNames
    Spessartine Garnet, Mandarin Garnet If Bright Orange
    GemstoneGroups
    Garnet
    KeySeparations
    RI, SI nature, and spectrum. Color is also helpful.
    ClassificationComments
  • Spessartite-garnet chemistry & crystallography

    ChemicalName
    manganese aluminium silicate
    ChemicalFormula
    Mn3Al2(SiO4)3
    Synthesis
    CrystalSystem
    Cubic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Spessartite-garnet optical properties

    Transparency
    Transparent
    Dispersion
    Strength: weak fire Value: 0.027
    OpticalComments
    RefractiveIndex
    Over The Limit 1.81-1.81
    Tolerance:(+0.004/-0.020)
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Singly Refractive (SR) With ADR
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    None
  • Spessartite-garnet characteristic physical properties

    Hardness
    7-7.5
    CharacteristicComments
    Streak
    SpecificGravity
    4.12-4.2 Range:0.05/-0.03 Typical:4.15
    Toughness
    Varies
    Inclusions
    Spessartite garnet is a type II clarity stone. Stones might have 2-phase, liquid inclusions that are feathery in appearance and rutile needle inclusions.
    Luster
    SubAdamantine
    Stability
    Good
    Fracture
    Conchoidal
    Cleavage
    None