Solid Blister Pearl Gemstone & Information | Gemopedia by JTV | Gemopedia™

Solid Blister Pearl

Solid blister pearls are bumpy growths formed on the inside surface of shells (not the traditional pearl as it grows attached to shell rather than inside the mollusk's body). They are hemispherical or irregular in shape and are cut from the shell.

Colors

White, Cream, Gray, Pink, Lavender

  • Solid-blister-pearl classification

    CommonName
    Solid Blister Pearl
    Species
    Cultured Pearl
    Variety
    Solid Blister Pearl
    Colors
    White, Cream, Gray, Pink, Lavender
    AlternateNames
    American Dome(R)
    GemstoneGroups
    KeySeparations
    Appearance, RI, birefringence blink and magnification. A "tooth test" is commonly used in which a pearl is rubbed against a tooth; if gritty, this is an indication that the surface is nacre, versus plastic and glass imitations that feel smooth.
    ClassificationComments
    Solid blister pearls are created by inserting a plastic hemisphere against the side of a fresh water oyster and nacre layers are laid down over the blank and then a mother-of-pearl boarder is cut out around the pearl.
  • Solid-blister-pearl chemistry & crystallography

    ChemicalName
    calcium carbonate + conchiolin and water
    ChemicalFormula
    CaCO3
    Synthesis
    CrystalSystem
    NA
    ChemistryClassification
    Organic
    Nature
    Cultured
    Crystallinity
    Non-Crystalline
    ChemistryComments
  • Solid-blister-pearl optical properties

    Transparency
    Translucent - Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    1.53-1.685
    Birefringence
    0.155
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Aggregate (AGG)
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    None
  • Solid-blister-pearl characteristic physical properties

    Hardness
    2.5-4
    CharacteristicComments
    Streak
    SpecificGravity
    Toughness
    Good
    Inclusions
    Solid blister pearl have an Iridescent surface.
    Luster
    Pearly
    Stability
    Poor
    Fracture
    Uneven
    Cleavage
    None