Aragonite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Aragonite

Aragonite's name is derived from the location of Molina de Aragon, Spain, the province where it was first discovered. Aragonite occurs in Agrigento, Sicily, Italy, in the famous sulfur mines, as well as on Mount Vesuvius, Italy. Aragonite specimens are highly prized by mineral collectors for their wide variety of forms, which include twins and pseudomorphs (uncharacteristic crystal forms). As an added bonus, many specimens are fluorescent as well as phosphorescent, a rare occurrence among minerals.

Colors

Colorless, Green, White, Gray, Red, Yellow, Brown, Blue, Violet

  • Aragonite classification

    CommonName
    Aragonite
    Species
    Aragonite
    Variety
    Colors
    Colorless, Green, White, Gray, Red, Yellow, Brown, Blue, Violet
    AlternateNames
    GemstoneGroups
    Aragonite
    KeySeparations
    RI, birefringence, optic character, SG, cleavage.
    ClassificationComments
    Aragonite effervesces to hydrochloric acid.
  • Aragonite chemistry & crystallography

    ChemicalName
    calcium carbonate
    ChemicalFormula
    CaCO3
    Synthesis
    CrystalSystem
    Orthorhombic
    ChemistryClassification
    Carbonate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Aragonite optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    1.53-1.685
    Birefringence
    0.155
    OpticCharacter
    Biaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Variable
    LWUV: Variable
    CCFReaction
    Pleochroism
    None
  • Aragonite characteristic physical properties

    Hardness
    3
    CharacteristicComments
    Streak
    White
    SpecificGravity
    2.93-2.95 Typical:2.94
    Toughness
    Varies
    Inclusions
    Luster
    Vitreous
    Stability
    Poor
    Fracture
    Subconchoidal, Splintery
    Cleavage
    Good, in one direction, Poor, in two directions