Bismuth Gemstone & Information | Gemopedia by JTV | Gemopedia™

Bismuth

Bismuth is rarely found naturally in its elemental form (even less commonly than platinum), but lab-grown crystals are gaining in popularity for their unique geometric formations (hopper crystals) and phenomenal iridescence. Bismuth is a silver-white metal, but an oxide layer forms immediately when crystals make contact with air. This produces an array of colors similar to that of a soap bubble or oil on water. The different colors are dependent upon the thickness of the oxide layer, which determines how light is reflected off of the surface creating a striking rainbow effect.

Colors

Metallic, Steel Gray With Varying Rainbow-Colored Iridescent Coating

  • Bismuth classification

    CommonName
    Bismuth
    Species
    Bismuth
    Variety
    Colors
    Metallic, Steel Gray With Varying Rainbow-Colored Iridescent Coating
    AlternateNames
    GemstoneGroups
    KeySeparations
    Appearance
    ClassificationComments
  • Bismuth chemistry & crystallography

    ChemicalName
    Bismuth
    ChemicalFormula
    Bi
    Synthesis
    CrystalSystem
    Trigonal
    ChemistryClassification
    Native Element
    Nature
    Synthetic
    Crystallinity
    Crystalline
    ChemistryComments
  • Bismuth optical properties

    Transparency
    Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    Birefringence
    OpticCharacter
    OpticSign
    PolariscopeReaction
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    None
  • Bismuth characteristic physical properties

    Hardness
    2-2.5
    CharacteristicComments
    Streak
    Silver White
    SpecificGravity
    9.7-9.8
    Toughness
    Inclusions
    Spiral stair-stepped structure
    Luster
    Metallic
    Stability
    Fracture
    Cleavage
    Perfect