Template:Rhodochrosite

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Rhodocrosite
Chemical composition MnCO3 + Fe, Ca
Crystal system Hexagonal
Habit Rhombohedral
Colors pink, red, yellowish, gray, brown
Hardness 3.5 - 4
Specific gravity 3.40 - 3.60
Refractive Index 1.60 - 1.83
Birefringence 0.220 Uniaxial negative
Lustre Vitreous to pearly