Cobaltocalcite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Cobaltocalcite

Cobaltocalcite refers to a stunning pink-red to slightly purplish-red cobalt-rich calcite mineral. Another name for this stone is cobaltoan calcite. Crystals often form as drusy masses and when faceted, gems are rarely seen in sizes greater than 2 carats.

Colors

Violet Red, Pale Pink, Pink, Rose Red, Gray, Brownish, Black

  • Cobaltocalcite classification

    CommonName
    Cobaltocalcite
    Species
    Calcite
    Variety
    Cobaltocalcite
    Colors
    Violet Red, Pale Pink, Pink, Rose Red, Gray, Brownish, Black
    AlternateNames
    Spherocobaltite
    GemstoneGroups
    Calcite
    KeySeparations
    ClassificationComments
  • Cobaltocalcite chemistry & crystallography

    ChemicalName
    ChemicalFormula
    CoCO3
    Synthesis
    CrystalSystem
    Trigonal
    ChemistryClassification
    Carbonate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Cobaltocalcite optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    Strength: strong fire
    OpticalComments
    RefractiveIndex
    Over the Limit 1.6-1.885
    Birefringence
    0.285
    OpticCharacter
    Uniaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    Dichroic, violet red to rose red
  • Cobaltocalcite characteristic physical properties

    Hardness
    3-4
    CharacteristicComments
    Streak
    SpecificGravity
    4.1-4.13
    Toughness
    Poor
    Inclusions
    Luster
    Stability
    Fracture
    Subconchoidal
    Cleavage
    Perfect, in three directions