Rhodonite (single crystal) Gemstone & Information | Gemopedia by JTV | Gemopedia™

Rhodonite (single crystal)

Rhodonite is an attractive mineral that is primarily known as an ornamental stone, but is often seen in jewelry in the form of beads or cabochons. This mineral easily falls into the category of rare and exotic, making it highly prized by collectors of specimens and gemstones. Its name, derived from two Greek roots, means "rose-colored stone." Rhodonite, which is commonly found in massive or granular forms, is most often translucent to opaque in appearance. On rare occasion, transparent, gem-quality material may be found. Rhodonite's natural color ranges from pink to rose red to brownish red, often with blackish veins throughout.

Colors

Red, Orangy Red, Pink

  • Rhodonite-single-crystal classification

    CommonName
    Rhodonite (single crystal)
    Species
    Rhodonite
    Variety
    Single Crystal Rhodonite
    Colors
    Red, Orangy Red, Pink
    AlternateNames
    GemstoneGroups
    KeySeparations
    RI, birefringence and spectrum.
    ClassificationComments
  • Rhodonite-single-crystal chemistry & crystallography

    ChemicalName
    manganese iron magnesium calcium silicate
    ChemicalFormula
    (Mn, Fe, Mg, Ca) SiO3
    Synthesis
    CrystalSystem
    Triclinic
    ChemistryClassification
    Silicate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Rhodonite-single-crystal optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    Strength: none
    OpticalComments
    RefractiveIndex
    1.733-1.747
    Tolerance:(+0.010/-0.013)
    Birefringence
    0.01-0.014
    OpticCharacter
    Biaxial
    OpticSign
    Positive
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    Dichroic, weak to moderate orangy red and brownish red
  • Rhodonite-single-crystal characteristic physical properties

    Hardness
    5.5-6.5
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3.3-3.76 Typical:3.5
    Toughness
    Poor
    Inclusions
    Rhodonite stones sometimes have black dendritic inclusions of manganese oxide.
    Luster
    Vitreous
    Stability
    Fracture
    Conchoidal
    Cleavage
    Perfect, in two directions