mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Hardness: 5.5-6.5 Mohs; Color: Pink to rosy red with black manganese oxide inclusions/veining; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 3.5-3.7
- Hardness
- 5
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 5.5-6.5 Mohs; Color: Pink to rosy red with black manganese oxide inclusions/veining; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 3.5-3.7
Formation & geological history
Formed in hydrothermal veins, contact metamorphic rocks, and manganese-rich sedimentary environments often through the metamorphism of other manganese minerals.
Uses & applications
Primarily used as a gemstone for jewelry (cabochons, beads) and ornamental carvings; also historically used as an ore of manganese.
Geological facts
The name comes from the Greek word 'rhodon', meaning rose. It was once believed to protect travelers from danger and was named the official state gemstone of Massachusetts in 1979.
Field identification & locations
Identify by its characteristic pink color paired with dendritic or veined black manganese patterns. It is much harder than Rhodochrosite (which fizzes in acid). Common locations include Russia, Australia, Brazil, and the USA.
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