Beryl Gemstone & Information | Gemopedia by JTV | Gemopedia™

Beryl

The name beryl is derived from the ancient Greek term for the same gem, beryllos; also the etymology for the element beryllium that is part of its chemistry. Some scholars believe the word beryl is related to the ancient trading city of Belur or perhaps has ancient Indian origins (being derived from the old Hindi word velurya or the Sanskrit word vaidurya). Varieties include emerald, bixbite (red beryl), morganite, aquamarine, heliodor (golden beryl) and goshenite.

Colors

Colorless, Green, Yellow, Light Orange, Pink, Red, Blue, Brown, Black

  • Beryl classification

    CommonName
    Beryl
    Species
    Beryl
    Variety
    Colors
    Colorless, Green, Yellow, Light Orange, Pink, Red, Blue, Brown, Black
    AlternateNames
    GemstoneGroups
    KeySeparations
    refractive index, birefringence, optic character
    ClassificationComments
    Varieties include emerald (green), aquamarine (blue to green), heliodor (yellow), morganite (pink), goshenite (colorless), brown and black beryls. Some varieties may also show optical phenomena such as chatoyancy or asterism.
  • Beryl chemistry & crystallography

    ChemicalName
    beryllium aluminum silicate
    ChemicalFormula
    Be3Al2(SiO3)6
    Synthesis
    CrystalSystem
    Hexagonal
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Beryl 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
    Varies based on color
  • Beryl 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
    All beryl are type I stones with the exception of emerald and bixbite which are Type III clarity stones. Stone might have liquid and fingerprint inclusions, 2-phase or 3-phase inclusions, tubular inclusions and needles.
    Luster
    Vitreous
    Stability
    Good
    Fracture
    Conchoidal
    Cleavage
    Poor, in one direction