Emerald (Synthetic - Hydrothermal) Gemstone & Information | Gemopedia by JTV | Gemopedia™

Emerald (Synthetic-Hydrothermal)

Hydrothermally grown synthetic emeralds crystallize slowly out of a solution (a mix of water and dissolved elements) that has been exposed to heat and pressure similar to the conditions on Earth under which the natural gem mineral grows. Synthetic gems have the same chemical, optical, and physical properties of their natural counterparts, but are a more cost-effective alternative to a natural gem.

Colors

Light To Very Dark Green To Strongly Bluish Green, Slightly Yellowish Green

  • Emerald-synthetic-hydrothermal classification

    CommonName
    Emerald (Synthetic-Hydrothermal)
    Species
    Beryl
    Variety
    Synthetic Emerald
    Colors
    Light To Very Dark Green To Strongly Bluish Green, Slightly Yellowish Green
    AlternateNames
    GemstoneGroups
    KeySeparations
    Refractive index, birefringence, optic character distinguished beryl from other materials, but magnification is essential for separating synthetic beryl from natural material.
    ClassificationComments
    Russian product: RI 1.572 to 1.578 and 1.579 to 1.584, birefringence 0.006 to 0.007, SG 2.63 to 2.73Chinese product: RI 1.570 to 1.572 and 1.576 to 1.578, birefringence 0.006, SG 2.67 to 2.71Biron product RI 1.569 to 1.573(+/-0.001) some 1.570 to 1.578, birefringence 0.004 to 0.008, SG 2.68 to 2.71. Misnomer: cultured emerald
  • Emerald-synthetic-hydrothermal chemistry & crystallography

    ChemicalName
    beryllium aluminum silicate
    ChemicalFormula
    Be3Al2(SiO3)6
    Synthesis
    hydrothermal
    CrystalSystem
    Hexagonal
    ChemistryClassification
    Silicate
    Nature
    Synthetic
    Crystallinity
    Crystalline
    ChemistryComments
  • Emerald-synthetic-hydrothermal optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    Strength: weak fire Value: 0.014
    OpticalComments
    RefractiveIndex
    1.571-1.584
    Tolerance:(+0.007/-0.002)
    Birefringence
    0.004-0.008
    OpticCharacter
    Uniaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Variable
    LWUV: Variable
    CCFReaction
    Sometimes bright red; not conclusive
    Pleochroism
    Dichroic, moderate to strong, varying shades of body color
  • Emerald-synthetic-hydrothermal characteristic physical properties

    Hardness
    7.5
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.63-2.73
    Toughness
    Good
    Inclusions
    Hydrothemal synthetic emerald often contains fingerprints, liquid and 2-phase inclusions, nailhead spicules, seed plates, opaque black hexagonal plates, synthetic phenakite or chrysoberyl crystals, gold inclusions, numerous red brown and fine white particles. The white material can also have the appearance of "comet tails" or stringers. In the Chinese and some Russian material wavy or chevron like growth can be seen.
    Luster
    Vitreous
    Stability
    Good
    Fracture
    Conchoidal
    Cleavage
    Poor, in one direction