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

Sapphire (Synthetic Czochralski)

Synthetic sapphire can be created in many ways, one of which is called the Czochralski method. During this process, the various elements that make up sapphire are melted in a platinum crucible. A small gem crystal (called a seed) attached to a rod is then dipped into the melt and slowly pulled away as the crystal grows around the seed. For this reason, the Czochralski method is also known as crystal pulling. 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 Pink, Pink, Reddish Purple, Purple

  • Sapphire-synthetic-czochralski classification

    CommonName
    Sapphire (Synthetic Czochralski)
    Species
    Corundum
    Variety
    Pulled Synthetic Fancy Sapphire
    Colors
    Light Pink, Pink, Reddish Purple, Purple
    AlternateNames
    Lab Created Fancy Sapphire
    GemstoneGroups
    KeySeparations
    magnification and RI, birefringence, pleochroism
    ClassificationComments
  • Sapphire-synthetic-czochralski chemistry & crystallography

    ChemicalName
    aluminum oxide
    ChemicalFormula
    Al2O3
    Synthesis
    Czochralski pulled
    CrystalSystem
    Trigonal
    ChemistryClassification
    Oxide
    Nature
    Synthetic
    Crystallinity
    Crystalline
    ChemistryComments
  • Sapphire-synthetic-czochralski 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: Variable
    LWUV: Variable
    CCFReaction
    Pink: weak red
    Pleochroism
    Dichroic, moderate, varying shades of body color
  • Sapphire-synthetic-czochralski characteristic physical properties

    Hardness
    9
    CharacteristicComments
    Streak
    White
    SpecificGravity
    4.1-3.95 Typical:4
    Toughness
    Excellent
    Inclusions
    Stones are almost always inclusion free. If internal characteristics are present they are gas bubbles, curved striae that is hard to see and smoke-like swirling veil-like inclusions.
    Luster
    SubAdamantine
    Stability
    Very Good
    Fracture
    Conchoidal
    Cleavage
    None