Quartzite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Quartzite

Quartzite is a metamorphic rock formed when sandstone (made up of tiny grains of quartz) is subjected to heat and pressure under Earths surface, fusing the sand grains together. The result is an extremely durable rock that can also be dyed to attractive colors.

Colors

Usually White To Gray, But Can Be Pink, Red, Yellow, Green, Blue, Orange Due To Impurities

  • Quartzite classification

    CommonName
    Quartzite
    Species
    Quartz
    Variety
    Quartzite
    Colors
    Usually White To Gray, But Can Be Pink, Red, Yellow, Green, Blue, Orange Due To Impurities
    AlternateNames
    GemstoneGroups
    KeySeparations
    Appearance, RI and magnification. Might show a band in the orange section of the spectra if dyed.
    ClassificationComments
  • Quartzite chemistry & crystallography

    ChemicalName
    silicon dioxide (aka silica)
    ChemicalFormula
    SiO2
    Synthesis
    CrystalSystem
    Trigonal
    ChemistryClassification
    Rock
    Nature
    Natural
    Crystallinity
    Aggregate
    ChemistryComments
  • Quartzite optical properties

    Transparency
    Translucent - Opaque
    Dispersion
    Strength: none
    OpticalComments
    RefractiveIndex
    1.544-1.553
    Tolerance:very constant
    Birefringence
    0.009
    OpticCharacter
    OpticSign
    PolariscopeReaction
    Aggregate (AGG)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    None
  • Quartzite characteristic physical properties

    Hardness
    7
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.64-2.69 Typical:2.66
    Toughness
    Good
    Inclusions
    Quartzite is an aggregate of tightly packed quartz grains.
    Luster
    Dull
    Stability
    Good
    Fracture
    Conchoidal, Granular
    Cleavage
    None