Milky Quartz Gemstone & Information | Gemopedia by JTV | Gemopedia™

Milky Quartz

Milky quartz is a translucent to opaque white to light gray variety of quartz. It is not commonly used as a gemstone, but is commonly sold as mineral specimens.

Colors

White, Very Light Gray

  • Milky-quartz classification

    CommonName
    Milky Quartz
    Species
    Quartz
    Variety
    Milky Quartz
    Colors
    White, Very Light Gray
    AlternateNames
    Milk Quartz, Snow Quartz, Quarzo Latteo, Blue Moon Quartz If It Has Blue Sheen
    GemstoneGroups
    KeySeparations
    Refractive index, appearance, birefringence, optic character and optic figure.
    ClassificationComments
    Misnomer: moonstone. Milky quartz is sometimes found with gold.
  • Milky-quartz chemistry & crystallography

    ChemicalName
    silicon dioxide (aka silica)
    ChemicalFormula
    SiO2
    Synthesis
    CrystalSystem
    Trigonal
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline to Aggregate
    ChemistryComments
  • Milky-quartz optical properties

    Transparency
    Translucent - Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    1.544-1.553
    Tolerance:very constant
    Birefringence
    0.009
    OpticCharacter
    Uniaxial
    OpticSign
    Positive
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    Unobservable
  • Milky-quartz characteristic physical properties

    Hardness
    7
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.64-2.69 Typical:2.66
    Toughness
    Good
    Inclusions
    CO2 or H2O inclusions in milky quartz give a milky appearance to the stone.
    Luster
    Vitreous
    Stability
    Good
    Fracture
    Conchoidal
    Cleavage
    None