Abalone Pearls Gemstone & Information | Gemopedia by JTV | Gemopedia™

Abalone Pearls

Abalone is a gastropod that produces nacreous pearls of great size and beauty but, since the mollusk only has one shell, the pearls almost always form in a baroque horn shape. Considered by some to be the most beautiful pearl, each can display a rainbow of iridescent colors, including blue, green, lavender, pink, orange and silver. As abalone pearls are difficult to harvest, they are among the rarest in the market.

Colors

Various

  • Abalone-pearls classification

    CommonName
    Abalone Pearls
    Species
    Calcareous Concretions
    Variety
    Abalone Pearls
    Colors
    Various
    AlternateNames
    GemstoneGroups
    KeySeparations
    RI, birefringence blink, magnification and appearance.
    ClassificationComments
    Use birefringence blink method to obtain birefringence. Abalone pearls are not considered true pearls. Some pearls are hollow and come from abalone and paua shells. There are 96 known varieties of abalone with different colors and sizes which effect the color, size and shape of the pearls produced. Magenta and peacock blue colors are the most valued.
  • Abalone-pearls chemistry & crystallography

    ChemicalName
    calcium carbonate, conchiolin and water
    ChemicalFormula
    CaCO3 with H2O and other organic materials
    Synthesis
    CrystalSystem
    NA
    ChemistryClassification
    Nature
    Natural
    Crystallinity
    Aggregate
    ChemistryComments
  • Abalone-pearls optical properties

    Transparency
    Semitranslucent - Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    1.4-1.5
    Birefringence
    OpticCharacter
    OpticSign
    PolariscopeReaction
    Aggregate (AGG)
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
  • Abalone-pearls characteristic physical properties

    Hardness
    CharacteristicComments
    Streak
    SpecificGravity
    Toughness
    Fair
    Inclusions
    Abalone pearls will display strong iridescent colors and most show brownish or discolored area.
    Luster
    Stability
    Poor
    Fracture
    Uneven
    Cleavage
    None