Diamond (Synthetic - CVD) Gemstone & Information | Gemopedia by JTV | Gemopedia™

Diamond (Synthetic - CVD)

Chemical vapor deposition diamonds (CVD diamonds) are fairly uncommon. These synthetic diamond gems crystallize from a chemical-rich vapor due to a chemical reaction that releases carbon atoms. These carbons atoms are then free to bond to a diamond seed plate where they form crystals. 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

Near Colorless, Faint To Dark Brown, Gray, Dark Blue

  • Diamond-synthetic-cvd classification

    CommonName
    Diamond (Synthetic - CVD)
    Species
    Diamond
    Variety
    CVD Synthetic Diamond
    Colors
    Near Colorless, Faint To Dark Brown, Gray, Dark Blue
    AlternateNames
    Lab Created Diamond
    GemstoneGroups
    KeySeparations
    Advanced laboratory testing
    ClassificationComments
    Usually very shallow stones.
  • Diamond-synthetic-cvd chemistry & crystallography

    ChemicalName
    carbon
    ChemicalFormula
    C
    Synthesis
    CVD
    CrystalSystem
    Cubic
    ChemistryClassification
    Nature
    Synthetic
    Crystallinity
    Crystalline
    ChemistryComments
  • Diamond-synthetic-cvd optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: moderate fire Value: 0.044
    OpticalComments
    RefractiveIndex
    Over the Limit 2.417-2.417
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Singly Refractive (SR)
    Fluorescence
    SWUV: weak to moderate orange to yellow orange
    LWUV: Inert to weak orange to yellow-orange.
    CCFReaction
    Pleochroism
    None
  • Diamond-synthetic-cvd characteristic physical properties

    Hardness
    10
    CharacteristicComments
    Streak
    SpecificGravity
    3.51-3.53 Typical:3.52
    Toughness
    Good
    Inclusions
    CVD synthetic diamonds are often inclusion free but might contain pinpoint brown or black inclusions. The black inclusions might be graphite. If a seed crystal is present there might be flux inclusions from a HPHT diamond.
    Luster
    Adamantine
    Stability
    Excellent
    Fracture
    Uneven
    Cleavage
    Perfect, in four directions