mineral

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)

Hardness: 5.5-6.5 on Mohs scale. Color: Rose-pink to brownish red with black dendritic inclusions of manganese oxide. Luster: Vitreous to pearly. Crystal structure: Triclinic. Specific gravity: 3.4-3.7.

Hardness: 5
Luster: Vitreous to pearly

Identified July 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed through metamorphic processes in manganese-rich environments, often occurring in hydrothermal veins or stratiform manganese deposits. It is frequently associated with other manganese minerals like rhodochrosite.

Uses & applications

Commonly used as an ornamental stone for carvings, beads, jewelry (cabochons), and lapidary work. It was historically used in some industrial manganese production but is now primarily a decorative mineral.

Geological facts

The name comes from the Greek word 'rhodos', meaning rosy. It is the state gem of Massachusetts, USA. The black veins often seen in tumbled pieces are manganese oxides that create a stark, attractive contrast with the pink base color.

Field identification & locations

Identify by its characteristic pink color paired with black manganese oxide 'veining' or dendritic patterns. It is found in Russia, Australia, Brazil, Sweden, and the USA. Collectors look for pieces with bright pink patches and minimal brown staining.

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Mineral

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