Rhodonite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Rhodonite

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

Pink To Brownish, Purplish Red Often With Black Veining, Brown, Green Areas Due To Impurities

  • Rhodonite classification

    CommonName
    Rhodonite
    Species
    Rhodonite
    Variety
    Colors
    Pink To Brownish, Purplish Red Often With Black Veining, Brown, Green Areas Due To Impurities
    AlternateNames
    Manganese Gravel, Fowlerite
    GemstoneGroups
    KeySeparations
    RI, birefringence, appearance and spectrum.
    ClassificationComments
    Misnomer: pink marble. Might have a spot reading of 1.54 due to quartz impurities.
  • Rhodonite chemistry & crystallography

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

    Transparency
    Translucent - Opaque
    Dispersion
    Strength: none
    OpticalComments
    RefractiveIndex
    1.733-1.747
    Tolerance:(+0.010/-0.013)
    Birefringence
    0.01-0.014
    OpticCharacter
    Biaxial
    OpticSign
    Positive
    PolariscopeReaction
    Aggregate (AGG)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    Unobservable
  • Rhodonite characteristic physical properties

    Hardness
    5.5-6.5
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3.3-3.76 Typical:3.5
    Toughness
    Good
    Inclusions
    Rhodonite might have black, white or metallic veins or spots of manganese oxide.
    Luster
    Vitreous
    Stability
    Fracture
    Conchoidal, Granular, Uneven
    Cleavage
    Perfect, in two directions