Rhodochrosite
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Rhodochrosite_Peru.jpg
Rhodochrosite_Peru.jpg
Rhodochrosite is a carbonate mineral with chemical composition MnCO3. It has a rose-red colour, its hardness varies between 3.5 and 4.5. It crystallizes in the trigonal system.
Its main use is as a source for manganese, but some jewelry is made from it, especially in Argentina.