Pyrite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Pyrite

Pyrite has a shiny golden-yellow color and a metallic luster. Its name comes from the Greek word pyr, meaning "a gemstone that strikes fire," due to the sparks produced when pyrite strikes iron. While pyrite has a history of being mistaken for gold, they are differentiated by pyrite's lighter, tougher, broken-faced grains. You may hear pyrite called by its nickname 'fool's gold,' or its jewelry trade name, "marcasite."

Colors

Metallic Yellow/Brassy

  • Pyrite classification

    CommonName
    Pyrite
    Species
    Pyrite
    Variety
    Colors
    Metallic Yellow/Brassy
    AlternateNames
    GemstoneGroups
    KeySeparations
    Appearance and SG, non-magnetic
    ClassificationComments
    Misnomers: fool's gold, marcasite
  • Pyrite chemistry & crystallography

    ChemicalName
    iron sulfide
    ChemicalFormula
    FeS2
    Synthesis
    CrystalSystem
    Cubic
    ChemistryClassification
    Sulfide
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Pyrite optical properties

    Transparency
    Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    1.81-0
    Birefringence
    OpticCharacter
    OpticSign
    PolariscopeReaction
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    None
  • Pyrite characteristic physical properties

    Hardness
    6-6.5
    CharacteristicComments
    Streak
    Greenish To Brownish Black Streak
    SpecificGravity
    4.9-5.1 Typical:5
    Toughness
    Good
    Inclusions
    Luster
    Metallic
    Stability
    Fracture
    Conchoidal, Uneven
    Cleavage
    None