Chrysocolla Gemstone & Information | Gemopedia by JTV | Gemopedia™

Chrysocolla

Chrysocolla, derived from the Greek chyrysos meaning "gold," is a copper mineral. Crystals are very rarely seen, but it is frequently intergrown with other minerals such as quartz or opal. This results in a harder, more resilient gemstone, as pure chrysocolla is soft and fragile. Its copper content is responsible for chrysocolla's range of bright green to blue hues.

Colors

Blue To Green

  • Chrysocolla classification

    CommonName
    Chrysocolla
    Species
    Chrysocolla
    Variety
    Colors
    Blue To Green
    AlternateNames
    GemstoneGroups
    KeySeparations
    RI, birefringence and appearance
    ClassificationComments
    Chrysocolla usually found as an inclusion in quartz, chalcedony or opal. Sometimes is found as druze.Misnomer: Abdollah-Giw Turquoise
  • Chrysocolla chemistry & crystallography

    ChemicalName
    hydrated copper silicate
    ChemicalFormula
    (Cu,Al)2H2Si2O5(OH)4.nH2O
    Synthesis
    CrystalSystem
    Monoclinic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline to Aggregate
    ChemistryComments
  • Chrysocolla optical properties

    Transparency
    Translucent - Opaque
    Dispersion
    Strength: none
    OpticalComments
    RefractiveIndex
    1.46-1.57
    Birefringence
    0.023-0.04
    OpticCharacter
    Biaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    Unobservable
  • Chrysocolla characteristic physical properties

    Hardness
    2-4
    CharacteristicComments
    Streak
    Green-White
    SpecificGravity
    2-2.4
    Toughness
    Poor
    Inclusions
    Chrysocolla often shows botryoidal growth structure and it often intergrown with chalcedony, malachite and turquoise.
    Luster
    Vitreous
    Stability
    Poor
    Fracture
    Conchoidal
    Cleavage
    None