Mystic Topaz Gemstone & Information | Gemopedia by JTV | Gemopedia™
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.
Mystic-topaz classificationCommonNameMystic TopazSpeciesTopazVarietyMystic TopazColorsVarious ColorsAlternateNamesGemstoneGroupsKeySeparationsrefractive 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.ClassificationCommentsStones 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 & crystallographyChemicalNamealuminium silicate fluoride hydroxide plus titanium coatingChemicalFormulaAl2(F,OH)2SiO4 + Ti coatingSynthesisCrystalSystemOrthorhombicChemistryClassificationSilicateNatureNaturalCrystallinityCrystallineChemistryComments
Mystic-topaz optical propertiesTransparencyTransparentDispersionStrength: weak fire Value: 0.014OpticalCommentsRefractiveIndex1.609-1.617Birefringence0.008-0.01OpticCharacterBiaxialOpticSignPositivePolariscopeReactionDoubly Refractive (DR)FluorescenceSWUV: Inert
Mystic-topaz characteristic physical propertiesHardness8CharacteristicCommentsStreakSpecificGravity3.49-3.57 Typical:3.53ToughnessGoodInclusionsMystic 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.LusterVitreousStabilityFairFractureConchoidalCleavagePerfect, in one direction