Sapphire (Synthetic - Flux) Gemstone & Information | Gemopedia by JTV | Gemopedia™

Sapphire (Synthetic - Flux)

Synthetic sapphire can be created in many ways, one of which is called flux growth. During the flux growth process, flux, a substance that reduces the melting point of surrounding material, is combined, in a metal-lined crucible, with the elements that make up a specific gem mineral. The crucible is heated until its contents are liquid and then it is allowed to cool very slowly. As cooling continues, the gem mineral crystallizes from the solution. Flux grown synthetic gems can take up to a year to grow to a facetable size, but the exceptional clarity of these gems is well worth the wait! 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

Violet Blue To Greenish Blue

  • Sapphire-synthetic-flux classification

    CommonName
    Sapphire (Synthetic - Flux)
    Species
    Corundum
    Variety
    Flux-Grown Synthetic Sapphire
    Colors
    Violet Blue To Greenish Blue
    AlternateNames
    Lab Created Sapphire
    GemstoneGroups
    KeySeparations
    refractive index, birefringence, pleochroism, magnification and spectrum
    ClassificationComments
  • Sapphire-synthetic-flux chemistry & crystallography

    ChemicalName
    aluminum oxide
    ChemicalFormula
    Al2O3
    Synthesis
    flux growth
    CrystalSystem
    Hexagonal
    ChemistryClassification
    Oxide
    Nature
    Synthetic
    Crystallinity
    Crystalline
    ChemistryComments
  • Sapphire-synthetic-flux optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: moderate fire Value: 0.018
    OpticalComments
    RefractiveIndex
    1.762-1.77
    Tolerance:(+0.009/-0.005)
    Birefringence
    0.008-0.01
    OpticCharacter
    Uniaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: weak to moderate chalky blue to blue-green to yellowish green
    LWUV: inert
    CCFReaction
    Pleochroism
    Dichroic, moderate to strong, varying shades of body color
  • Sapphire-synthetic-flux characteristic physical properties

    Hardness
    9
    CharacteristicComments
    Streak
    SpecificGravity
    3.95-4.1 Typical:4
    Toughness
    Excellent
    Inclusions
    Platinum platelets from the crucible that appear metallic in reflected light but appear dark when stone is lit from behind. Flux is often white, brownish, yellow or orange but can be colorless. Flux inclusions can appear like natural fingerprint inclusions, wispy veils, comet tails, coarse globules of flux that can have a myriad of appearances from drippy, tubular or rod like or icicle looking, to clouds and minute particles, Stone might display angular growth zoning similar to natural.
    Luster
    SubAdamantine
    Stability
    Very Good
    Fracture
    Conchoidal
    Cleavage
    None