Jadeite Jade Gemstone & Information | Gemopedia by JTV | Gemopedia™

Jadeite Jade

Jade has been treasured for some 7,000 years for its unique luster, lovely color and impeccable toughness. This precious gem has always had special significance in many Asian cultures, and can be compared to the West's admiration of diamonds and gold. For centuries, nephrite jade and jadeite were considered one and the same. It was not until 1863 that they were identified as different minerals with a similar appearance and properties.

Colors

White, Greenish Blue To Blue, Light To Dark Green, Yellow To Reddish Orange, Brown, Gray, Black, Light To Dark Purple-Violet To Violetish Purple Often Mottled

  • Jadeite-jade classification

    CommonName
    Jadeite Jade
    Species
    Jadeite
    Variety
    Colors
    White, Greenish Blue To Blue, Light To Dark Green, Yellow To Reddish Orange, Brown, Gray, Black, Light To Dark Purple-Violet To Violetish Purple Often Mottled
    AlternateNames
    Lavender Jadeite, New Blue Jade
    GemstoneGroups
    KeySeparations
    RI, spectrum, SG, and sometimes appearance. The detection of dyes might require advanced lab testing. Scratch test can be used but is destructive. Dyed jadeite stones will have a broad band in the red area of the spectrum and natural jadeite colored with chrome will only have 3 lines in the yellow, orange and red.
    ClassificationComments
    Idocrase mixed with hydrogrossular garnet Imperial jade / gem jade / emerald jade is considered the finest quality of jade. It is semitransparent and has an even, intense emerald-green color.Apple green jade is a vibrant medium yellowish green about the color of a granny smith apple.Chloromelanite is semitranslucent to opaque variety of jade that can be very dark green to black. The stones get their color from chromium and iron. The stone can have uneven color actually a mixture of jadeite and other pyroxene minerals which are minerals found in igneous and metamorphic rocks.Yunan jade the dark green variety that is semitranslucent to opaque.Moss-in-snow is translucent mottled white and has green veining, patches or spots called streamers.Fei-ts'ui or Kingfisher jade comes from Burma and is an intense medium green less intense than Imperial jade.
  • Jadeite-jade chemistry & crystallography

    ChemicalName
    sodium aluminum silicate
    ChemicalFormula
    NaAlSi2O6
    Synthesis
    CrystalSystem
    Monoclinic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Polycrystalline
    ChemistryComments
  • Jadeite-jade optical properties

    Transparency
    Semitransparent - Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    1.666-1.68
    Tolerance:(+0.008/-0.008)
    Birefringence
    OpticCharacter
    OpticSign
    PolariscopeReaction
    Aggregate (AGG)
    Fluorescence
    SWUV: Variable
    LWUV: Variable
    CCFReaction
    Pleochroism
    None
  • Jadeite-jade characteristic physical properties

    Hardness
    6.5-7
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3.25-3.4 Typical:3.34
    Toughness
    Excellent
    Inclusions
    Jadeite is made up tightly packed crystals and you might see the crystals sparkle on areas that have not been polished on larger-grained items. Stone often are unevenly colored with root like mottling. If the item is dyed it might be possible to see dye concentrations. Dyed jadeite is usually unevenly colored but sometimes you might be able to see dye concentrations under magnification. You might observe the orange peel effect on older pieces due to differential hardness of the stone. The use of modern polishing compounds has all but eliminated the orange peel problem.
    Luster
    Vitreous
    Stability
    Good
    Fracture
    Splintery, Granular, Subconchodial
    Cleavage
    None