mineral
Rhodochrosite
Rhodochrosite, Manganese Carbonate (MnCO3)
Hardness: 3.5-4, Color: Rose-red to pale pink, often with white or gray banding, Luster: Vitreous to pearly, Crystal structure: Trigonal, Cleavage: Perfect rhombohedral, Specific gravity: 3.5-3.7
- Hardness
- 3
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Physical properties
Hardness: 3.5-4, Color: Rose-red to pale pink, often with white or gray banding, Luster: Vitreous to pearly, Crystal structure: Trigonal, Cleavage: Perfect rhombohedral, Specific gravity: 3.5-3.7
Formation & geological history
Forms in hydrothermal veins associated with silver, copper, and lead sulfides, and in some metamorphic rocks and sedimentary deposits.
Uses & applications
Used primarily as an ore of manganese, and extensively in jewelry and lapidary arts due to its beautiful pink color and banding. Highly valued by mineral collectors.
Geological facts
Rhodochrosite is the national gemstone of Argentina (often featuring stalactitic banding as seen in the 'Inca Rose' variety) and the state mineral of Colorado, USA, home of the famous Sweet Home Mine.
Field identification & locations
Identified by its distinctive pink color, often with white banding, and its relatively low hardness and reaction to warm hydrochloric acid. Banded massive material is commonly found in Argentina.
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