mineral
Rhodochrosite Pebble
MnCO3 (Manganese Carbonate)
AI-generated identification · may be incorrectHardness: 3.5-4 on the Mohs scale. Color: Pink to rose-red, brownish-pink. Luster: Vitreous to pearly. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral. Specific Gravity: 3.5-3.7.
- Hardness
- 3
- Color
- Pink to rose-red, brownish-pink
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 3.5-4 on the Mohs scale. Color: Pink to rose-red, brownish-pink. Luster: Vitreous to pearly. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral. Specific Gravity: 3.5-3.7.
Formation & geological history
Forms primarily as a secondary mineral in hydrothermal veins of manganese deposits and volcanic rocks. It precipitates from manganese-bearing fluids at moderate temperatures.
Uses & applications
Used as an gemstone for jewelry, cabochons, carved ornaments, and an important minor ore of manganese. Extremely popular among rock collectors.
Geological facts
Rhodochrosite is the national gemstone of Argentina and the state mineral of Colorado. Its name comes from the Greek words 'rhodon' (rose) and 'chros' (color).
Field identification & locations
Recognizable by its distinctive pink color, soft hardness (can be scratched by a copper coin or steel nail), and reactivity with warm dilute hydrochloric acid. Commonly found in Argentina, USA (Sweet Home Mine, CO), South Africa, and Peru.
