Bustamite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Bustamite

Named in honor of its discoverer, Anastio Bustamente, bustamite is a member of the wollastonite group. Often similar to rhodonite in appearance, it is usually found as a massive transparent pink material that may be cut into cabochons or carved into figurines.

Colors

Pink, Reddish-Violet, Yellow, Brownish Red

  • Bustamite classification

    CommonName
    Bustamite
    Species
    Bustamite
    Variety
    Colors
    Pink, Reddish-Violet, Yellow, Brownish Red
    AlternateNames
    GemstoneGroups
    Wollastonite
    KeySeparations
    RI, birefringence, optic character
    ClassificationComments
    Pink color fades after exposed to sunlight.
  • Bustamite chemistry & crystallography

    ChemicalName
    manganese calcium silicate
    ChemicalFormula
    (Ca,Mn2+)3[Si3O9]
    Synthesis
    CrystalSystem
    Triclinic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Bustamite optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: weak fire
    OpticalComments
    RefractiveIndex
    1.662-1.707
    Birefringence
    0.014-0.015
    OpticCharacter
    Biaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Moderate violet red
    LWUV: Strong red
    CCFReaction
    Pleochroism
    Dichroic, unobservable to weak pinkish red and orange
  • Bustamite characteristic physical properties

    Hardness
    5.5-6
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3.32-3.43
    Toughness
    Poor
    Inclusions
    Luster
    Vitreous
    Stability
    Fracture
    Conchoidal
    Cleavage
    Perfect, in one direction, Good, in two directions, Poor, in one direction