mineral

Rhodochrosite Pebble

MnCO3 (Manganese Carbonate)

Hardness: 3.5-4 on the Mohs scale. Color: Pink to rose-red, brownish-pink. Luster: Vitreous to pearly. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral. Specific Gravity: 3.5-3.7.

Hardness: 3
Color: Pink to rose-red, brownish-pink
Luster: Vitreous to pearly

Identified July 23, 2026More mineral →

Explore Rhodochrosite Pebble in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 3.5-4 on the Mohs scale. Color: Pink to rose-red, brownish-pink. Luster: Vitreous to pearly. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral. Specific Gravity: 3.5-3.7.

Formation & geological history

Forms primarily as a secondary mineral in hydrothermal veins of manganese deposits and volcanic rocks. It precipitates from manganese-bearing fluids at moderate temperatures.

Uses & applications

Used as an gemstone for jewelry, cabochons, carved ornaments, and an important minor ore of manganese. Extremely popular among rock collectors.

Geological facts

Rhodochrosite is the national gemstone of Argentina and the state mineral of Colorado. Its name comes from the Greek words 'rhodon' (rose) and 'chros' (color).

Field identification & locations

Recognizable by its distinctive pink color, soft hardness (can be scratched by a copper coin or steel nail), and reactivity with warm dilute hydrochloric acid. Commonly found in Argentina, USA (Sweet Home Mine, CO), South Africa, and Peru.