Rhodochrosite
Image: Robert M. Lavinsky (CC BY-SA 3.0)
Mineral NameRhodochrosite
Chemical FormulaMnCO₃
Mohs Hardness3.5
Crystal Systemtrigonal
Lustervitreous
Streak Colorwhite
Cleavageperfect rhombohedral on {1011}
Fractureuneven
Specific Gravity3.6
Colorspink, rose-red, reddish-brown
Transparencytranslucent
Type LocalityCapillitas Mine, Andalgalá, Catamarca, Argentina
Mineral GroupCarbonates
Usesjewelry, ornamental stone, collector
Associated Mineralsquartz, fluorite, calcite, pyrite
Rarityuncommon
Description
This specimen displays a beautiful stalactitic formation of rhodochrosite, characterized by a botryoidal surface and a striking color gradient from vibrant pink at the top to a deeper reddish-brown towards the base.
Geological Context
Rhodochrosite typically forms in hydrothermal veins associated with manganese, silver, lead, and copper deposits, or as a secondary mineral in manganese ore bodies. It can also occur in low-temperature sedimentary environments.
