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

Drusy Quartz

The word "drusy," is a mineralogical term used as both a noun and an adjective. The noun refers to a mineral coating of thin layers of tiny, tightly-packed crystals that resemble glittering sugar granules. The adjective refers to any such granulated crystal layers in reference to a given mineral; in this case, drusy quartz. Drusy quartz is usually found in the inside of geodes. When fashioned into loose gemstones and jewelry, it is often coated with a metallic color to capitalize on the glittering natural crystal facets and give it a more bold appearance.

Colors

Various Colors

  • Drusy-quartz classification

    CommonName
    Drusy Quartz
    Species
    Quartz
    Variety
    Colors
    Various Colors
    AlternateNames
    Druse Quartz, Druzy Quartz
    GemstoneGroups
    KeySeparations
    Appearance, refractive index, birefringence
    ClassificationComments
    Drusy or druse is a fine layer of crystals that coat a rock or mineral.
  • Drusy-quartz chemistry & crystallography

    ChemicalName
    silicon dioxide (aka silica)
    ChemicalFormula
    SiO2
    Synthesis
    CrystalSystem
    Trigonal
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Polycrystalline
    ChemistryComments
  • Drusy-quartz optical properties

    Transparency
    Translucent - Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    1.544-1.553
    Tolerance:very constant
    Birefringence
    OpticCharacter
    Uniaxial
    OpticSign
    Positive
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    None
  • Drusy-quartz characteristic physical properties

    Hardness
    7
    CharacteristicComments
    Streak
    SpecificGravity
    Toughness
    Varies
    Inclusions
    Drusy quartz is often treated by means of CVD to give a metallic luster and range of colors.
    Luster
    Vitreous
    Stability
    Fair
    Fracture
    Conchoidal
    Cleavage
    None