Rutile Gemstone & Information | Gemopedia by JTV | Gemopedia™
The name rutile comes from the Latin rutilas, meaning "reddish," as this mineral is usually red to golden in color. Rutile forms in a wide array of habits, and is often seen as an inclusion within gems, either in large needles that make bold patterns, or fine, microscopic fibers that cause chatoyancy and asterism in gems. It is highly refractive, and is occasionally found in facetable sizes.
Red, Reddish Brown, Pale Yellow, Pale Blue, Violet, Black, Green
Rutile classificationCommonNameRutileSpeciesRutileVarietyColorsRed, Reddish Brown, Pale Yellow, Pale Blue, Violet, Black, GreenAlternateNamesGemstoneGroupsKeySeparationsHigh luster, extreme fire, OTL RI reading, eye visible doubling, poor polish.ClassificationCommentsRutile often is seen as golden needles in other gem materials. Synthetic rutile is used as a diamond simulant.
Rutile chemistry & crystallographyChemicalNametitanium oxideChemicalFormulaTiO2SynthesisCrystalSystemTetragonalChemistryClassificationOxideNatureNaturalCrystallinityCrystallineChemistryComments
Rutile optical propertiesTransparencyTransparent - OpaqueDispersionStrength: extreme fire Value: 0.33OpticalCommentsRefractiveIndexOver the Limit 2.616-2.903Birefringence0.287OpticCharacterUniaxialOpticSignPositivePolariscopeReactionDoubly Refractive (DR)FluorescenceSWUV: Inert
LWUV: InertCCFReactionPleochroismDichroic, strong, varying shades of body color
Rutile characteristic physical propertiesHardness6-6.5CharacteristicCommentsStreakGrayish Black, Pale Brown, Light YellowSpecificGravity4.2-4.3 Typical:4.26ToughnessVariesInclusionsLusterAdamantineStabilityFractureConchoidal, UnevenCleavageGood, in two directions