mineral

Tumbled rhodonite

Rhodonite, manganese inosilicate (MnSiO₃)

AI-generated identification · may be incorrect

Typically rose-pink to red with black manganese-oxide veining, vitreous to pearly luster, triclinic crystal structure, and perfect cleavage in two directions; Mohs hardness 5.5–6.5, specific gravity about 3.4–3.7. The rounded shape and smooth surface indicate tumbling or polishing.

Identified August 28, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in manganese-rich metamorphic rocks, commonly through hydrothermal or contact-metamorphic processes; deposits range from Precambrian to younger ages. Common sources include Russia, Australia, Brazil, Peru, Sweden, and the United States.

Uses & applications

Used as a lapidary stone for cabochons, beads, carvings, and ornamental objects; rarely used industrially because it is not abundant enough for bulk manganese production.

Geological facts

Black dendritic or massive veins are manganese oxides, especially pyrolusite, and are a useful diagnostic feature. Rhodonite is often confused with rhodochrosite, but rhodonite is generally harder and commonly has black veining.

Field identification & locations

Identify by its opaque pink-red color, black matrix or veins, moderate hardness, and relatively high density; a streak test is white to pale pink. This specimen appears to be a common polished/tumbled piece rather than gem-grade material.