Rhodochrosite (Manganesespar)

Rhodochrosite (Greek - rose coloured) is usually raspberry red and pink colour. The aggregates are light-dark stripes with zigzag bands. Transparent crystals are rare.

Rhodochrosite Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 
 
 

Rhodochrosite Gemstones by Size

This table shows distribution of Rhodochrosite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:0.29 cts
Heaviest:90.68 cts
Average:18.16 cts
Total photos:73
Do you have a larger Rhodochrosite? Why not upload a photo?
0.29ct to 9.33ct9.33ct to 18.37ct18.37ct to 27.41ct27.41ct to 36.45ct36.45ct to 45.49ct45.49ct to 54.52ct54.52ct to 63.56ct63.56ct to 72.60ct72.60ct to 81.64ct81.64ct to 90.68ct
General Information
Chemical Formula
Mn
2+
 
CO
 
3
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Photos of natural/un-cut material from mindat.org
Physical Properties of Rhodochrosite
Mohs Hardness4
Walter Schumann, Gemstones of the world (2001)
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Specific Gravity3.45 to 3.70
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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TenacityBrittle
Arthur Thomas, Gemstones (2009)
Cleavage QualityPerfect
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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FractureUneven,Conchoidal
Walter Schumann, Gemstones of the world (2001)
Optical Properties of Rhodochrosite
Refractive Index1.578 to 1.820
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) BlinkingMore from other references
Optical CharacterUniaxial/-
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Birefringence0.208 to 0.220
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) DoublingMore from other references
PleochroismDistinct: pinkish-red - colorless/light pink
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Dispersion0.015
Walter Schumann, Gemstones of the world (2001)
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Colour
Colour (General)Pinkish to red
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Causes of ColourPink to red, Mn2+ in octahedral coordination, with minor Fe2+ Mn3+ in octahedral coordination
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyTransparent
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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LustreVitreous,Resinous
Arthur Thomas, Gemstones (2009)
Fluorescence & other light emissions
Fluorescence (General)Under both forms of UV there is a pink response from the mineral as a whole though individual specimens may not show much.
Michael O’Donoghue, Gems, Sixth Edition (2006)
Fluorescence (Long-Wave UV)Inert to yellow
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Crystallography of Rhodochrosite
Crystal SystemTrigonal
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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HabitCommonly aggregates with botryoidal forms
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Geological Environment
Where found:Rhodochrosite occurs as a primary mineral in low- to moderate-temperature hydrothermal veins, also in metamorphic deposits and in carbonatites.
Michael O’Donoghue, Gems, Sixth Edition (2006)
Further Information
Mineral information:Rhodochrosite information at mindat.org
Significant Gem Localities
Argentina
 
  • Catamarca
Saadi and Grasso (1992)
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443
China
 
  • Guangxi Zhuang Autonomous Region
    • Wuzhou Prefecture
      • Cangwu Co.
        • Liubao
Japan
 
  • Hokkaido
    • Shiribeshi Province
      • Shakotan peninsula
        • Furubira
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443
Myanmar
 
  • Mandalay Region (Mandalay Division)
    • Pyin-Oo-Lwin District
      • Mogok Township
        • Kyatpyin North
Ted Themelis (2008) Gems & mines of Mogok
        • Kyauk-Pyat-That
Ted Themelis (2008) Gems & mines of Mogok
Peru
 
  • Ancash Department
    • Aija Province
      • Huaraz
        • La Merced
    • Pallasca Province
      • Pampas District
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443
  • Huancavelica Department
    • Huancavelica Province
      • Ascencion District
        • Yauricocha Parish
  • Junín Department
    • Yauli Province
      • Morococha District
  • Lima Department
    • Oyon Province
South Africa
 
  • Northern Cape Province
    • Kalahari manganese field
      • Hotazel
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443
      • Kuruman
        • N'Chwaning Mines
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443
USA
 
  • Colorado
    • Park Co.
      • Alma District
        • Mount Bross
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443
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