Gilson Imitation Coral Gemstone & Information | Gemopedia by JTV | Gemopedia™

Gilson Imitation Coral

A synthetic, imitation coral made from calcite and silica, Gilson imitation coral requires heat and pressure to create the final product. This imitation does not exhibit the natural grains often visible in true coral, and shows fine granulation under magnification.

Colors

Red, Pink

  • Gilson-imitation-coral classification

    CommonName
    Gilson Imitation Coral
    Species
    NA
    Variety
    Colors
    Red, Pink
    AlternateNames
    GemstoneGroups
    KeySeparations
    RI and magnification
    ClassificationComments
    Misnomer: synthetic coral
  • Gilson-imitation-coral chemistry & crystallography

    ChemicalName
    ChemicalFormula
    Synthesis
    CrystalSystem
    NA
    ChemistryClassification
    Nature
    Simulant
    Crystallinity
    Aggregate
    ChemistryComments
  • Gilson-imitation-coral optical properties

    Transparency
    Semitranslucent - Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    1.55
    Birefringence
    OpticCharacter
    OpticSign
    PolariscopeReaction
    Aggregate (AGG)
    Fluorescence
    SWUV: inert
    LWUV: variable
    CCFReaction
    Pleochroism
    None
  • Gilson-imitation-coral characteristic physical properties

    Hardness
    3.5-4
    CharacteristicComments
    Streak
    SpecificGravity
    Typical:2.44
    Toughness
    Good
    Inclusions
    Natural coral will have polyp cavities and fibrous structure imitation coral will have a granular structure under magnification.
    Luster
    Subvitreous
    Stability
    Fracture
    Granular
    Cleavage
    None