Beryllonite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Beryllonite

Named for its beryllium content, beryllonite is a colorless to white or pale yellowish crystal. It is usually transparent with a vitreous to pearly luster, and is often heavily included. This rare gem is found in only a few places around the world, notably in Maine, USA.

Colors

Colorless, White, Pale Yellow

  • Beryllonite classification

    CommonName
    Beryllonite
    Species
    Beryllonite
    Variety
    Colors
    Colorless, White, Pale Yellow
    AlternateNames
    GemstoneGroups
    KeySeparations
    RI, optic character
    ClassificationComments
  • Beryllonite chemistry & crystallography

    ChemicalName
    sodium beryllium phosphate
    ChemicalFormula
    NaBePO4
    Synthesis
    CrystalSystem
    Monoclinic
    ChemistryClassification
    Phosphate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Beryllonite optical properties

    Transparency
    Transparent
    Dispersion
    Strength: weak fire Value: 0.01
    OpticalComments
    RefractiveIndex
    1.552-1.561
    Birefringence
    0.009-0.01
    OpticCharacter
    Biaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    None
  • Beryllonite characteristic physical properties

    Hardness
    5.5-6
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.79-2.87
    Toughness
    Poor
    Inclusions
    Beryllonite is typically included and will have fluid inclusions.
    Luster
    Vitreous
    Stability
    Fracture
    Conchoidal
    Cleavage
    Perfect