Phosphosiderite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Phosphosiderite

Phosphosiderite is a vibrant purple orchid color and is a relative newcomer to the world of gemstones as it was only discovered in the late 19th century. Fine quality phosphosiderite is hard to come by and this opaque gemstone may contain veins of yellow. In addition to purple, phosphosiderite occurs in colors ranging from white, pink, red, violet red and colorless.

Colors

Red, Reddish Violet, Reddish Purple, Lavender, Pink, Dark Blue, Yellow-Orange, Moss Green To Almost Colorless

  • Phosphosiderite classification

    CommonName
    Phosphosiderite
    Species
    Phosphosiderite
    Variety
    Colors
    Red, Reddish Violet, Reddish Purple, Lavender, Pink, Dark Blue, Yellow-Orange, Moss Green To Almost Colorless
    AlternateNames
    GemstoneGroups
    KeySeparations
    RI and SG
    ClassificationComments
  • Phosphosiderite chemistry & crystallography

    ChemicalName
    hydrated iron phosphate
    ChemicalFormula
    Fe3+PO4.2H2O
    Synthesis
    CrystalSystem
    Monoclinic
    ChemistryClassification
    Phosphate
    Nature
    Natural
    Crystallinity
    Crystalline to Aggregate
    ChemistryComments
  • Phosphosiderite optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: extreme fire
    OpticalComments
    RefractiveIndex
    1.692-1.739
    Birefringence
    0.046
    OpticCharacter
    Biaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    Trichroic, weak to moderate pinkish red, purplish red, and colorless
  • Phosphosiderite characteristic physical properties

    Hardness
    3.5-4
    CharacteristicComments
    Streak
    SpecificGravity
    2.74-2.8
    Toughness
    Poor
    Inclusions
    Phosphosiderite sometimes has botryoidal or radial fibrous structure and might have yellow veins.
    Luster
    Vitreous
    Stability
    Fracture
    Uneven
    Cleavage
    Good, in one direction, Poor, in one direction