Stilbite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Stilbite

Stilbite is named from a Greek term meaning "to glitter" due to the pearly luster of the mineral. A member of the zeolite group, stilbite is often white, peach, pinkish, yellow or brown in color. Stilbite is further classified based on its sodium and calcium content. Stilbite is rarely faceted, but its attractive crystals make it highly collectable as mineral specimens

Colors

White, Colorless, Red, Light Yellow, Brown, Light Brown, Cream, Orange, Pink

  • Stilbite classification

    CommonName
    Stilbite
    Species
    Stilbite
    Variety
    Colors
    White, Colorless, Red, Light Yellow, Brown, Light Brown, Cream, Orange, Pink
    AlternateNames
    Desmine, Stilbite-Ca
    GemstoneGroups
    KeySeparations
    RI
    ClassificationComments
  • Stilbite chemistry & crystallography

    ChemicalName
    ChemicalFormula
    NaCa4(Si27Al9)O72 28(H2O)
    Synthesis
    CrystalSystem
    Monoclinic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline to Aggregate
    ChemistryComments
  • Stilbite optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: weak fire
    OpticalComments
    RefractiveIndex
    1.484-1.513
    Birefringence
    0.01-0.013
    OpticCharacter
    Biaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    Unobservable
  • Stilbite characteristic physical properties

    Hardness
    3.5-4
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.1-2.2
    Toughness
    Poor
    Inclusions
    Luster
    Vitreous
    Stability
    Fracture
    Conchoidal
    Cleavage
    Perfect, in one direction