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

Spinel (Synthetic - Flux)

One method of creating synthetic spinel 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

Slightly Purplish Red, Medium Dark To Dark Blue, Very Slightly Violet Blue

  • Spinel-synthetic-flux classification

    CommonName
    Spinel (Synthetic - Flux)
    Species
    Spinel
    Variety
    Flux-Grown Synthetic Spinel
    Colors
    Slightly Purplish Red, Medium Dark To Dark Blue, Very Slightly Violet Blue
    AlternateNames
    Flux-Grown Synthetic Spinel, Alumag, Corundolite, Lustergem, Magalux, Radient, Strongite ,Wesselton, Simulated Diamond, Aquagem, Rozircon, Berylite, Dirigem, Perigem, Emerada, Erinide
    GemstoneGroups
    KeySeparations
    Magnification, spectrum and RI
    ClassificationComments
    Colorless variety trade names: Alumag, Corundolite, Lustergem, Magalux, Radient, Strongite ,Wesselton, Simulated Diamond. Colored variety trade names: Aquagem, Rozircon, Berylite, Dirigem, Perigem, Emerada, Erinide. Misnomers: Brazilian Emerald, synthetic aquamarine, synthetic birthstone varieties, synthetic peridot, Hope Sapphire, Jourado Diamond.
  • Spinel-synthetic-flux chemistry & crystallography

    ChemicalName
    magnesium aluminum oxide
    ChemicalFormula
    MgAl2O4
    Synthesis
    flux growth
    CrystalSystem
    Cubic
    ChemistryClassification
    Oxide
    Nature
    Synthetic
    Crystallinity
    Crystalline
    ChemistryComments
  • Spinel-synthetic-flux optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: weak fire Value: 0.02
    OpticalComments
    RefractiveIndex
    1.719
    Tolerance:(+0.003/-0.003)
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Singly Refractive (SR) With ADR
    Fluorescence
    SWUV: Variable
    LWUV: Variable
    CCFReaction
    Blue: red to orangy red
    Pleochroism
    None
  • Spinel-synthetic-flux characteristic physical properties

    Hardness
    8
    CharacteristicComments
    Streak
    SpecificGravity
    3.58-3.64 Typical:3.61
    Toughness
    Varies
    Inclusions
    Flux-grown spinel typically has flux residue inclusions that can be orangy brown to black in color. Some flux inclusions are singular but others can be mistaken for fingerprint inclusions. Stones might contain metallic platelets from the platinum crucible. Dark blue stones might show a red flash under penlight due to cobalt coloring agent.
    Luster
    SubAdamantine
    Stability
    Very Good
    Fracture
    Conchoidal
    Cleavage
    None