Goshenite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Goshenite

While most members of the beryl family such as emerald or aquamarine are famous for their colors, goshenite is the highly collectible colorless variety that displays a diamond-like fiery brilliance. Interestingly, pure beryl is colorless, with traces of different metallic elements being responsible for this gem family's great color range. Always limited in availability, goshenite is named for the locale where it was first discovered--Goshen, Massachusetts.

Colors

colorless

  • Goshenite classification

    CommonName
    Goshenite
    Species
    Beryl
    Variety
    Goshenite
    Colors
    colorless
    AlternateNames
    Colorless Beryl
    GemstoneGroups
    KeySeparations
    refractive index, birefringence and optic character
    ClassificationComments
  • Goshenite chemistry & crystallography

    ChemicalName
    beryllium aluminum silicate
    ChemicalFormula
    Be3Al2(SiO3)6
    Synthesis
    CrystalSystem
    Hexagonal
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Goshenite optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: weak fire Value: 0.014
    OpticalComments
    RefractiveIndex
    1.577-1.583
    Tolerance:(+0.017/-0.017)
    Birefringence
    0.005-0.009
    OpticCharacter
    Uniaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    Unobservable
  • Goshenite characteristic physical properties

    Hardness
    7.5
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.67-2.9 Range:0.18/-0.05 Typical:2.72
    Toughness
    Good
    Inclusions
    Goshenite is a type I clarity stone but sometimes contains tubular, liquid or two-phase inclusions.
    Luster
    Vitreous
    Stability
    Good
    Fracture
    Conchoidal
    Cleavage
    Poor, in one direction