Heliodor (Golden Beryl) Gemstone & Information | Gemopedia by JTV | Gemopedia™

Heliodor (Golden Beryl)

Displaying characteristic yellow to yellowish greens, heliodor is the most cheerful variety of beryl. Interestingly, as an allochromatic gem, pure beryl is colorless, with traces of different elements responsible for beryl's wide range of colors. Heliodor is named from ancient Greek words meaning "gift from the sun," as it was once believed that heliodor harnessed the power and warmth of the sun and was responsible for the change between day and night.

Colors

Yellow, Greenish Yellow To Orangy Yellow

  • Heliodor-golden-beryl classification

    CommonName
    Heliodor (Golden Beryl)
    Species
    Beryl
    Variety
    Heliodor
    Colors
    Yellow, Greenish Yellow To Orangy Yellow
    AlternateNames
    Golden Beryl
    GemstoneGroups
    KeySeparations
    refractive index, birefringence, optic character, and possibly magnification
    ClassificationComments
    RI usually falls closer to the 1.577 range.
  • Heliodor-golden-beryl chemistry & crystallography

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

    Transparency
    Transparent - Translucent
    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
    Dichroic, weak to moderate, varying shades of body color
  • Heliodor-golden-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
    Heliodor is a type I clarity stone but sometimes contains tubular, liquid or planes of small two-phase inclusions.
    Luster
    Vitreous
    Stability
    Good
    Fracture
    Conchoidal
    Cleavage
    Poor, in one direction