Pyromorphite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Pyromorphite

Pyromorphite is a member of the apatite family of minerals. Faceted stones are very rare and its colors are usually brown, green, orange, yellow, colorless, gray and white. Pyromorphite was named in 1813 from the Greek words for "fire" and "form" because, after being melted, the mineral will take on a crystalline shape upon cooling.

Colors

Brown, Green, Orange, Yellow, Gray, White, Colorless

  • Pyromorphite classification

    CommonName
    Pyromorphite
    Species
    Pyromorphite
    Variety
    Colors
    Brown, Green, Orange, Yellow, Gray, White, Colorless
    AlternateNames
    GemstoneGroups
    Apatite
    KeySeparations
    OTL RI, appearance and cleavage.
    ClassificationComments
  • Pyromorphite chemistry & crystallography

    ChemicalName
    lead chlorophosphate
    ChemicalFormula
    Pb5(PO4)3Cl
    Synthesis
    CrystalSystem
    Hexagonal
    ChemistryClassification
    Phosphate
    Nature
    Natural
    Crystallinity
    Crystalline to Aggregate
    ChemistryComments
  • Pyromorphite optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    Strength: strong fire
    OpticalComments
    RefractiveIndex
    Over the Limit 2.042-2.059
    Birefringence
    0.01
    OpticCharacter
    Uniaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    Unobservable
  • Pyromorphite characteristic physical properties

    Hardness
    3.5-4
    CharacteristicComments
    Streak
    White
    SpecificGravity
    6.5-7.1
    Toughness
    Poor
    Inclusions
    Luster
    Vitreous
    Stability
    Fracture
    Subconchoidal
    Cleavage
    Poor, in one direction