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

Rhodochrosite (single crystal)

One of nature's more exotic treasures, rhodochrosite is a manganese carbonate that gets its name from two Greek words: "rhodon," meaning rose and "chros," meaning color. A fitting name indeed as its finest colors range from very pale pink, pale to deep orangey red. Yellow to brown crystals are also known. Clean, transparent, facetable material is extremely rare and highly sought after by gem collectors. Faceting such crystals presents a challenge to cutters due to the gem's perfect cleavage in three directions. Semi-translucent to opaque rhodochrosite is often carved or cut en cabochon and typically displays "bacon strip" or "bull's eye" patterns.

Colors

Pink, Pinkish Orange To Deep Red

  • Rhodochrosite-single-crystal classification

    CommonName
    Rhodochrosite (single crystal)
    Species
    Rhodochrosite
    Variety
    Colors
    Pink, Pinkish Orange To Deep Red
    AlternateNames
    GemstoneGroups
    KeySeparations
    RI, birefringence and spectrum. Use birefringence blink method. Stones have eye visible doubling.
    ClassificationComments
  • Rhodochrosite-single-crystal chemistry & crystallography

    ChemicalName
    manganese carbonate
    ChemicalFormula
    MnCO3
    Synthesis
    CrystalSystem
    Trigonal
    ChemistryClassification
    Carbonate
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Rhodochrosite-single-crystal optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    Strength: weak fire Value: 0.015
    OpticalComments
    RefractiveIndex
    Over The Limit 1.597-1.817
    Tolerance:(+0.003/-0.003)
    Birefringence
    0.22
    OpticCharacter
    Uniaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert to weak red
    LWUV: Inert to moderate red
    CCFReaction
    Pleochroism
    Dichroic, moderate to strong red to yellowish orange and orangy pink to brownish red
  • Rhodochrosite-single-crystal characteristic physical properties

    Hardness
    3.5-4.5
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3.7-3.71
    Toughness
    Poor
    Inclusions
    Rhodochrosite typically has many liquid and 2-phase inclusions.
    Luster
    Vitreous
    Stability
    Fracture
    Granular, Uneven
    Cleavage
    Perfect, in one direction