Cubic Zirconia (Synthetic) Gemstone & Information | Gemopedia by JTV | Gemopedia™

Cubic Zirconia (Synthetic)

Cubic Zirconia (abbreviated CZ) is the best-known man-made diamond simulant. A simulant is any material, natural or created by man, which imitates the appearance of a natural gem whereas a synthetic gem is man-made but must have a natural counterpart that duplicates the chemical, optical, and physical properties of the natural gem. While it's often touted as the most popular diamond simulant, cubic zirconia is also a synthetic gem. Natural crystals of cubic zirconia have only been found as inclusions in zircon.

Colors

Colorless, Pink, Grayish Blue To Dark Blue, Pale To Strong Yellow, Orangy Yellow, Orange, Orange Red, Red, Yellowish Green, Bluish Green, Green, Purple, Brown, Black

  • Cubic-zirconia-synthetic classification

    CommonName
    Cubic Zirconia (Synthetic)
    Species
    NA
    Variety
    Colors
    Colorless, Pink, Grayish Blue To Dark Blue, Pale To Strong Yellow, Orangy Yellow, Orange, Orange Red, Red, Yellowish Green, Bluish Green, Green, Purple, Brown, Black
    AlternateNames
    CZ, Cubic Z, Diamond-Z, Diamonair II, Diamononesque, Diamonite, Djevalite, Phianite, C-Ox, Pearl CZ
    GemstoneGroups
    KeySeparations
    Negative reaction to diamond tester, OTL RI, strong fire, lack of doubling, SG, fracture and pavilion flash. Orange pavilion flash when view through magnification if well cut stone. Slight see-through effect.
    ClassificationComments
    Misnomer: synthetic diamond. Heft higher than a diamond. Translucent pink SG: 6.14 to 6.16Translucent white or pearl CZ SG: 6.11 to 6.12
  • Cubic-zirconia-synthetic chemistry & crystallography

    ChemicalName
    zirconium oxide
    ChemicalFormula
    ZrO2
    Synthesis
    skull melt
    CrystalSystem
    Cubic
    ChemistryClassification
    Oxide
    Nature
    Synthetic
    Crystallinity
    Crystalline
    ChemistryComments
  • Cubic-zirconia-synthetic optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: strong fire Value: 0.06
    OpticalComments
    RefractiveIndex
    Over The Limit 2.15-2.182
    Tolerance:0.03
    Birefringence
    OpticCharacter
    NA
    OpticSign
    PolariscopeReaction
    Singly Refractive (SR)
    Fluorescence
    SWUV: varies with colorcolorless: yellow or greenish yellowtranslucent pink: weak to moderate, chalky light yellow-green translucent white: very light pink
    LWUV: varies with colorcolorless: greenish yellow or yellow-orangetranslucent pink: strong yellow-greentranslucent white: inert
    CCFReaction
    Translucent white: yellowish green; Translucent black: dark red
    Pleochroism
    None
  • Cubic-zirconia-synthetic characteristic physical properties

    Hardness
    8.5
    CharacteristicComments
    Streak
    SpecificGravity
    5.6-6 Typical:5.8
    Toughness
    Good
    Inclusions
    Cubic zirconia is type I clarity stone. Stones are often free of inclusions but might have gas bubbles or zirconium oxide remnants. Translucent stones are uniform in color in reflected light and banded or striped in strong transmitted light.
    Luster
    SubAdamantine
    Stability
    Fracture
    Conchoidal
    Cleavage
    None