Septaria Gemstone & Information | Gemopedia by JTV | Gemopedia™

Septaria

Nicknamed the "dragon stone," septaria has unique mineral patterns that resemble tree branches. Specimens are usually in the form of sliced nodules ranging from an inch in diameter to more than three feet across. They are estimated to have formed between 50 and 70 million years ago after periodic volcanic eruptions killed small sea life. The shells and carcasses of these creatures sank to the sea bed, where sediments accumulated around them to form nodules or balls of mud. When the waters eventually receded, the mud balls dried out and began to shrink and crack into the beautiful patterns that you see inside the septarian nodules.

Colors

Brown, Tan, Black, Gray, White, Reddish, Golden

  • Septaria classification

    CommonName
    Septaria
    Species
    Septaria
    Variety
    Colors
    Brown, Tan, Black, Gray, White, Reddish, Golden
    AlternateNames
    Septarian Concretions Or Septarian Nodules
    GemstoneGroups
    KeySeparations
    Appearance
    ClassificationComments
    Septarian nodules often contain calcite crystals and rarely pyrite.
  • Septaria chemistry & crystallography

    ChemicalName
    ChemicalFormula
    Synthesis
    CrystalSystem
    NA
    ChemistryClassification
    Rock
    Nature
    Natural
    Crystallinity
    Aggregate
    ChemistryComments
  • Septaria optical properties

    Transparency
    Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    None
  • Septaria characteristic physical properties

    Hardness
    CharacteristicComments
    Streak
    SpecificGravity
    Toughness
    Inclusions
    Septaria are cracks or separations in rock.
    Luster
    Dull
    Stability
    Fracture
    Cleavage
    None