Melanite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Melanite

Melanite is an extremely rare opaque jet-black variety of andradite garnet. The high luster of this gem, when faceted, makes the stone look like black glass. Melanite was extremely popular in Victorian period mourning jewelry.

Colors

Black

  • Melanite classification

    CommonName
    Melanite
    Species
    Andradite
    Variety
    Melanite
    Colors
    Black
    AlternateNames
    Titanian Andradite
    GemstoneGroups
    Garnet
    KeySeparations
    OTL RI and SG
    ClassificationComments
    Melanite's strong dispersion is masked by bodycolor.
  • Melanite chemistry & crystallography

    ChemicalName
    calcium iron silicate
    ChemicalFormula
    Ca3Fe2(SiO4)3
    Synthesis
    CrystalSystem
    Cubic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Melanite optical properties

    Transparency
    Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    Over the Limit 1.855-1.895
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Singly Refractive (SR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    None
  • Melanite characteristic physical properties

    Hardness
    6.5-7
    CharacteristicComments
    Streak
    SpecificGravity
    3.7-4.1
    Toughness
    Poor
    Inclusions
    Luster
    SubAdamantine
    Stability
    Good
    Fracture
    Conchoidal, Uneven
    Cleavage
    None