Kunzite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Kunzite

Kunzite is the pretty pink, most popular, and commercially important variety of the spodumene family, cousin to hiddenite (green spodumene) and triphane (yellow spodumene). Due to its strong pleochroism, kunzite has to be oriented particularly and cut carefully in order to achieve the deepest tone and saturation, as the stone's best color is seen when looking down the length of the crystal. Stones of 10 carats or larger display kunzite's pastel hues best, though it can be found in quite large crystals over 1,000 carats.

Colors

Pink To Violet Pink

  • Kunzite classification

    CommonName
    Kunzite
    Species
    Spodumene
    Variety
    Kunzite
    Colors
    Pink To Violet Pink
    AlternateNames
    GemstoneGroups
    KeySeparations
    refractive index, birefringence and fluorescence. Biaxial common point is 0.006 from high RI.
    ClassificationComments
    Color may fade in some kunzite upon exposure to sunlight. Stones often have deep pavilions to improve color.
  • Kunzite chemistry & crystallography

    ChemicalName
    lithium aluminum silicate
    ChemicalFormula
    LiAlSi2O6
    Synthesis
    CrystalSystem
    Monoclinic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Kunzite optical properties

    Transparency
    Transparent
    Dispersion
    Strength: moderate fire Value: 0.017
    OpticalComments
    RefractiveIndex
    1.66-1.676
    Birefringence
    0.014-0.016
    OpticCharacter
    Biaxial
    OpticSign
    Positive
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Weak to moderate yellowish pink to orange
    LWUV: Strong yellowish pink to orange
    CCFReaction
    Pleochroism
    Trichroic, moderate to strong pink, purplish pink, and colorless
  • Kunzite characteristic physical properties

    Hardness
    6.5-7
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3.15-3.21 Range:+/-0.03 Typical:3.18
    Toughness
    Poor
    Inclusions
    Kunzite is a type I clarity stone. Kunzite sometimes has growth and etch tubes, healing cracks, liquid and multi-phase inclusions.
    Luster
    Vitreous
    Stability
    Fracture
    Uneven, Splintery
    Cleavage
    Perfect, in two directions