Mystic Topaz Gemstone & Information | Gemopedia by JTV | Gemopedia™

Mystic Topaz

Sometimes, man's imagination is able to create things that even Mother Nature couldn't dream of. With its dazzling kaleidoscope of colors, mystic topaz first appeared in September 1998 at the Hong Kong Jewelry Fair, but it took a few years for designers and high-end jewelry manufacturers to realize its unquestionable charm. Mystic topaz begins with a natural topaz gemstone that was created millions of years ago, that is then made even more beautiful and desirable with the assistance of modern technology. The chemical vapor deposition (CVD) process deposits a thin film onto part of the surface of a white topaz gem, creating an eye-catching rainbow effect as light passes through the gem, which results in an unbelievable array of colors.

Colors

Various Colors

  • Mystic-topaz classification

    CommonName
    Mystic Topaz
    Species
    Topaz
    Variety
    Mystic Topaz
    Colors
    Various Colors
    AlternateNames
    GemstoneGroups
    KeySeparations
    refractive index, birefringence, optic character; possibly specific gravity. Some topaz is coated, causing an inert reaction to LWUV and SWUV, different spectra and variable reactions to a CCF test.
    ClassificationComments
    Stones are Chemical Vapor Deposition treated with titanium and other metals to produce a range of colors. Biaxial positive common point is 0.001 from low RISurface treated green stones: RI 1.609 to 1.617
  • Mystic-topaz chemistry & crystallography

    ChemicalName
    aluminium silicate fluoride hydroxide plus titanium coating
    ChemicalFormula
    Al2(F,OH)2SiO4 + Ti coating
    Synthesis
    CrystalSystem
    Orthorhombic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Mystic-topaz optical properties

    Transparency
    Transparent
    Dispersion
    Strength: weak fire Value: 0.014
    OpticalComments
    RefractiveIndex
    1.609-1.617
    Birefringence
    0.008-0.01
    OpticCharacter
    Biaxial
    OpticSign
    Positive
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    Unobservable
  • Mystic-topaz characteristic physical properties

    Hardness
    8
    CharacteristicComments
    Streak
    SpecificGravity
    3.49-3.57 Typical:3.53
    Toughness
    Good
    Inclusions
    Mystic topaz is a type II clarity stone. Stones have a coating on the pavilion or crown of stone There might scratches of treated surface of the stone that show colorless areas underneath. Stones sometimes contain long tube-like cavities containing liquid, healed fractures and areas that look like they are starting to cleave. Stones might include 2-phase and 3-phase inclusions some of which contain more than one liquid that have not been mixed. Surface treated green topaz is blue green in appearance and looks spotty there might also be blue color concentrations in surface reaching fractures.
    Luster
    Vitreous
    Stability
    Fair
    Fracture
    Conchoidal
    Cleavage
    Perfect, in one direction