General Information |
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Chemical Formula | Michael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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Physical Properties of Rhodochrosite |
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Mohs Hardness | 4Walter Schumann, Gemstones of the world (2001) More from other references |
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Specific Gravity | 3.45 to 3.70Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Tenacity | BrittleArthur Thomas, Gemstones (2009) |
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Cleavage Quality | PerfectHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Fracture | Uneven,ConchoidalWalter Schumann, Gemstones of the world (2001) |
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Optical Properties of Rhodochrosite |
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Refractive Index | 1.578 to 1.820Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Optical Character | Uniaxial/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Birefringence | 0.208 to 0.220Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Pleochroism | Distinct: pinkish-red - colorless/light pinkHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Dispersion | 0.015Walter Schumann, Gemstones of the world (2001) More from other references |
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Colour |
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Colour (General) | Pinkish to redHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Causes of Colour | Pink to red, Mn2+ in octahedral coordination, with minor Fe2+ Mn3+ in octahedral coordinationW. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011) |
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Transparency | TransparentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Lustre | Vitreous,ResinousArthur Thomas, Gemstones (2009) |
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Fluorescence & other light emissions |
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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) |
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Fluorescence (Long-Wave UV) | Inert to yellowHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Crystallography of Rhodochrosite |
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Crystal System | TrigonalHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Habit | Commonly aggregates with botryoidal formsUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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Geological Environment |
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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 |
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Mineral information: | Rhodochrosite information at mindat.org |
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Significant Gem Localities |
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| Argentina | |
| Saadi and Grasso (1992) |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443 | | China | |
| | | Japan | |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443 | | Myanmar | |
| Ted Themelis (2008) Gems & mines of Mogok |
| Ted Themelis (2008) Gems & mines of Mogok | | Peru | |
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| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443 |
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| | | South Africa | |
- John Taolo Gaetsewe District Municipality
- Joe Morolong Local Municipality
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443 |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443 |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443 | | USA | |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 443 |
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