mineral

Rhodonite in Quartz Matrix

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

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

Hardness: 5
Color: Pink to rosy-red with black manganese oxide inclusions
Luster: Vitreous to pearly

Identified March 30, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through hydrothermal processes or contact metamorphism of manganese-bearing sediments. Often found in metamorphic rocks alongside other manganese minerals. Geological age varies by deposit location ranging from Precambrian to more recent eras.

Uses & applications

Used primarily as an ornamental stone, for lapidary work (cabochons, beads), and occasionally as a minor ore of manganese. It is a popular collector's mineral due to its distinct pink-and-black contrast.

Geological facts

The name comes from the Greek word 'rhodon', meaning rose. It was designated the state gemstone of Massachusetts in 1979. It is often confused with rhodochrosite, but can be distinguished by its greater hardness and the presence of black dendritic veins.

Field identification & locations

Identify in the field by its characteristic pink hue, high density, and the presence of black manganese oxide veins or spots. Common locations include Russia, Australia, Brazil, and the USA (New Jersey and Massachusetts). Collectors should look for deep pink color with well-defined black patterns.

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