mineral

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Hardness: 5.5-6.5 on the Mohs scale. Color: Rose-pink to brownish red, often with black manganese oxide veins. Luster: Vitreous to pearly. Crystal Structure: Triclinic. Specific Gravity: 3.57-3.76.

Hardness: 5
Luster: Vitreous to pearly

Identified May 9, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 on the Mohs scale. Color: Rose-pink to brownish red, often with black manganese oxide veins. Luster: Vitreous to pearly. Crystal Structure: Triclinic. Specific Gravity: 3.57-3.76.

Formation & geological history

Forms in manganese-rich metamorphic rocks, often associated with manganese ores in hydrothermal veins or contact metamorphic deposits. Famous deposits date from various geological periods where manganese enrichment occurred.

Uses & applications

Primarily used as an ornamental stone, for lapidary work (cabochons, beads), and occasionally as a minor ore of manganese. It is popular in jewelry and for decorative carvings.

Geological facts

The name comes from the Greek word 'rhodon' meaning rose. It was designated as the official state gemstone of Massachusetts in 1979.

Field identification & locations

Identify by its characteristic pink color paired with black dendritic (tree-like) patterns of manganese oxide. Found in Russia (Urals), Sweden, Australia, Canada, and the USA. Collectors look for deep pink specimens with aesthetic black veining.