mineral

Rhodonite

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

Hardness: 5.5 to 6.5 Mohs scale; Color: Pink to rose-red with black manganese oxide inclusions; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific gravity: 3.5–3.7

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

Identified March 16, 2026More mineral →

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Physical properties

Formation & geological history

Formed in metamorphic rocks (especially those containing manganese), hydrothermal veins, and contact metamorphic zones. Most significant deposits range from the Proterozoic to the Tertiary period.

Uses & applications

Used primarily as a gemstone for jewelry (cabochons, beads), decorative carvings, ornamental stones, and occasionally as a minor ore of manganese.

Geological facts

Rhodonite is the state gem of Massachusetts. The name is derived from the Greek word 'rhodos', meaning rose. It is often confused with rhodochrosite, but rhodonite is harder and usually features black dendritic veins (manganese oxides) rather than white banding.

Field identification & locations

Identify in the field by its distinct 'bubblegum' pink color contrasted with black veining and high hardness (it cannot be scratched by a copper penny or a knife easily). Found globally in Russia, Australia, Brazil, Canada, and the USA (New Jersey).

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