mineral

Tumbled rhodonite

Rhodonite, manganese inosilicate (MnSiO₃)

AI-generated identification · may be incorrect

Typically rose-pink to reddish brown with black manganese-oxide veining; vitreous to pearly luster, triclinic crystals, Mohs hardness 5.5–6.5, and specific gravity about 3.4–3.7. The smooth rounded surface indicates mechanical tumbling and polishing.

Identified August 22, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in manganese-rich metamorphic deposits through hydrothermal or metamorphic processes, commonly associated with quartz and oxides. Deposits range from Precambrian to younger geological ages.

Uses & applications

Used as an ornamental stone, carving material, lapidary cabochons, and inexpensive jewelry; manganese-bearing rhodonite has minor industrial significance.

Geological facts

Its pink color comes from manganese, while black dendritic or vein-like patterns are commonly manganese oxides. It can resemble rhodochrosite but is generally harder and less distinctly banded.

Field identification & locations

Identify it by the pink body color, dark manganese markings, relatively high density, and hardness below quartz; common sources include Russia, Australia, Peru, Brazil, and the United States. Acid and hardness tests should be performed cautiously on polished specimens.