Rhodochrosite

Rhodochrosite derives its pink color from manganese. It is relatively difficult to find gem-quality crystals, yet they do occur. A Rhodochrosite crystal is often cut for collectors because of a hardness of 4 on the Mohs scale. On the other hand, the fine-grained, branded rock is more commonly used for decoration.

Occurrence

Rhodochrosite occurs in veins associated with manganese, copper, silver, and lead deposits. Argentina has the oldest mines. The branded rhodochrosite from there is called ‘Inca rose.’ Today, the prime commercial sources are in the USA.

Rhodochrosite Properties

• Specific Gravity: 3.60
• Refractive Index: 1.60-1.80
• Birefringence (DR): 0.220
• Luster: Vitreous to pearly
• Crystal Structure: Trigonal
• Composition: Manganese carbonate
• Hardness: 4

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