mineral

Rhodonite

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

Hardness: 5.5-6.5 on Mohs scale; Color: Pink, rose-red, or brownish-red, often with black manganese oxide veins; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect; Specific Gravity: 3.5-3.7

Hardness: 5
Luster: Vitreous to pearly

Identified June 26, 2026More mineral →

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Physical properties

Formation & geological history

Formed in manganese-rich metamorphic rocks and hydrothermal deposits. It often occurs as a result of contact metamorphism in manganese ores. It is commonly found in older Precambrian metamorphic terranes.

Uses & applications

Used primarily as a gemstone, for lapidary work (cabochons, beads), and as an ornamental stone for carvings and vases. Historically used as a minor ore of manganese.

Geological facts

The name is derived from the Greek word 'rhodon', meaning 'rose'. It is the state gemstone of Massachusetts, USA. The black veins often seen in it are denderitic manganese oxides caused by weathering.

Field identification & locations

Identified in the field by its distinct pink color paired with black dendritic veins and its relatively high hardness compared to Rhodochrosite (which reacts to acid and is much softer). Common locations include Russia, Australia, Brazil, and the USA.