mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Hardness: 3.5-4 on Mohs scale; Color: Pink, rose-red, cherry-red, yellowish-gray, or brown; Luster: Vitreous to pearly; Crystal System: Trigonal; Cleavage: Perfect rhombohedral; Specific Gravity: 3.5-3.7

Hardness: 3
Color: Pink, rose-red, cherry-red, yellowish-gray, or brown
Luster: Vitreous to pearly

Identified July 20, 2026More mineral →

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Physical properties

Formation & geological history

Forms primarily in hydrothermal veins associated with silver, copper, and lead deposits, and as secondary minerals in manganese oxide deposits. It is commonly found in metamorphic and sedimentary rocks through replacement processes.

Uses & applications

Primarily used as an ore of manganese. Also used as a semi-precious gemstone in jewelry (cabochons and beads) and as a highly sought-after collector\'s specimen due to its vibrant pink color.

Geological facts

The name is derived from the Greek word \'rhodokhros\', meaning rose-colored. It is the national gemstone of Argentina and the state mineral of Colorado, USA. The Incas believed rhodochrosite was the blood of their former kings turned into stone.

Field identification & locations

Identified in the field by its distinct pink color, relatively low hardness (can be scratched by a copper coin), and its effervescent reaction to warm hydrochloric acid. Common locations include Argentina, Peru, South Africa, and the Sweet Home Mine in Colorado.