mineral

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

Hardness: 5.5-6.5 on the Mohs scale; Color: Pink to rosy red, often with black manganese oxide veins; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions.

Hardness: 5
Color: Pink to rosy red, often with black manganese oxide veins
Luster: Vitreous to pearly

Identified March 14, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 on the Mohs scale; Color: Pink to rosy red, often with black manganese oxide veins; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions.

Formation & geological history

Formed in metamorphic rocks through regional or hydrothermal metamorphism, often found in manganese-rich sedimentary processes. Found in geological environments like hydrothermal replacement deposits.

Uses & applications

Commonly used for lapidary work, decorative carvings, jewelry (cabochons and beads), and as a minor ore of manganese. Prized by collectors for its unique 'pink and black' aesthetic.

Geological facts

Rhodonite gets its name from the Greek word 'rhodos', meaning rosy. It is the state gemstone of Massachusetts, USA. Unlike Rhodochrosite, Rhodonite is an inosilicate (silicate) rather than a carbonate.

Field identification & locations

Identify in the field by its distinctive pink color paired with black dendritic veins of Manganese oxide. It is harder than rhodochrosite and will not react to cold hydrochloric acid. Major sources include Brazil, Russia, Australia, and the USA.