Rhodonite

Physical Properties

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

Formation & Geological History

Formed in manganese-rich metamorphic rocks or hydrothermal deposits. Found in metamorphic rocks often associated with other manganese minerals like bustamite or tephroite.

Uses & Applications

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

Geological Facts

The name comes from the Greek word 'rhodos', meaning rose. It was once used as a stone of protection for travelers in Russia and was designated the state gemstone of Massachusetts in 1979.

Field Identification & Locations

Identify by its characteristic 'cotton candy' pink color mixed with distinct black dendritic or veined patterns. Found in Australia, Brazil, Canada, and Russia. Collectors look for high contrast between pink and black.

Identified on: 4/29/2026

Mode: Standard