mineral

Rhodonite

Rhodonite (Mn, Fe, Mg, Ca)SiO3

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

Hardness: 5
Luster: Vitreous to pearly

Identified March 28, 2026More mineral →

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Physical properties

Formation & geological history

Forms primarily in metamorphic rocks as a result of regional metamorphism or hydrothermal activity affecting manganese-rich sediments. It is often found in contact metamorphic zones involving silica-rich magma.

Uses & applications

Commonly used in jewelry (cabochons and beads), ornamental pieces, sculptures, and as a decorative stone. It is also a popular specimen for mineral collectors and is sometimes used as a minor ore of manganese.

Geological facts

Rhodonite is the state gemstone of Massachusetts. Its name is derived from the Greek word 'rhodon', meaning rose. Unlike rhodochrosite, it contains silicate rather than carbonate, making it significantly harder and more durable for wear.

Field identification & locations

Identify in the field by its distinct pink color paired with black dendritic or vein-like inclusions of manganese oxide. Found in locations like Australia (Broken Hill), Russia (Ural Mountains), Brazil, Peru, and the USA (New Jersey). Collectors should look for vibrant pink hues and minimal internal fractures.