Dolomite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Dolomite

Dolomite is a white to brownish and sometimes pink-colored mineral named for French mineralogist Dodat Gratet de Dolomieu in 1791. Specimens are usually found in crystal clusters and have been known to be large in size. Transparent dolomite gems can be difficult to find due to their cleavage and low hardness value and are usually preferred as a collectors stone.

Colors

White, Gray, Pink, Yellow, Brown

  • Dolomite classification

    CommonName
    Dolomite
    Species
    NA
    Variety
    Colors
    White, Gray, Pink, Yellow, Brown
    AlternateNames
    Dolostone
    GemstoneGroups
    KeySeparations
    RI
    ClassificationComments
    Dolomite has a high sensitivity to heat.
  • Dolomite chemistry & crystallography

    ChemicalName
    calcium magnesium carbonate
    ChemicalFormula
    CaMg(CO3)2
    Synthesis
    CrystalSystem
    Trigonal
    ChemistryClassification
    Carbonate
    Nature
    Natural
    Crystallinity
    Crystalline to Aggregate
    ChemistryComments
  • Dolomite optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: weak fire
    OpticalComments
    RefractiveIndex
    1.502-1.698
    Birefringence
    0.179-0.185
    OpticCharacter
    Uniaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Variable
    LWUV: Variable
    CCFReaction
    Pleochroism
    None
  • Dolomite characteristic physical properties

    Hardness
    3.5-4
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.8-2.95
    Toughness
    Poor
    Inclusions
    Luster
    Vitreous
    Stability
    Poor
    Fracture
    Subconchoidal
    Cleavage
    Perfect, in one direction