Rutile Gemstone & Information | Gemopedia by JTV | Gemopedia™

Rutile

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.

Colors

Red, Reddish Brown, Pale Yellow, Pale Blue, Violet, Black, Green

  • Rutile classification

    CommonName
    Rutile
    Species
    Rutile
    Variety
    Colors
    Red, Reddish Brown, Pale Yellow, Pale Blue, Violet, Black, Green
    AlternateNames
    GemstoneGroups
    KeySeparations
    High luster, extreme fire, OTL RI reading, eye visible doubling, poor polish.
    ClassificationComments
    Rutile often is seen as golden needles in other gem materials. Synthetic rutile is used as a diamond simulant.
  • Rutile chemistry & crystallography

    ChemicalName
    titanium oxide
    ChemicalFormula
    TiO2
    Synthesis
    CrystalSystem
    Tetragonal
    ChemistryClassification
    Oxide
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Rutile optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: extreme fire Value: 0.33
    OpticalComments
    RefractiveIndex
    Over the Limit 2.616-2.903
    Birefringence
    0.287
    OpticCharacter
    Uniaxial
    OpticSign
    Positive
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    Dichroic, strong, varying shades of body color
  • Rutile characteristic physical properties

    Hardness
    6-6.5
    CharacteristicComments
    Streak
    Grayish Black, Pale Brown, Light Yellow
    SpecificGravity
    4.2-4.3 Typical:4.26
    Toughness
    Varies
    Inclusions
    Luster
    Adamantine
    Stability
    Fracture
    Conchoidal, Uneven
    Cleavage
    Good, in two directions