Rhodonite
Rhodonite · Semi-Precious Gemstone and Decorative Stone
Crystal System
Triclinic, typically found in massive, granular, or compact habit
Mineral Group
Silicates, specifically Inosilicates (single-chain silicates)
Chemical Formula
Mn2+SiO3
Formation Process
Metamorphic, typically forming in manganese-rich metamorphic rocks and metasomatic deposits under high temperatures and pressures
About This Crystal
A polished, rounded cabochon-like stone exhibiting a vibrant pink to rose-red body color mottled with dark black dendritic veins and patches of manganese oxide. It has a vitreous to sub-vitreous luster and ranges from translucent to opaque.
Physical Characteristics
Pink body color with black inclusions; white streak; perfect cleavage in two directions at roughly 88 and 92 degrees; uneven to conchoidal fracture; specific gravity around 3.4 to 3.7; brittle tenacity; non-magnetic
Optical Properties
Biaxial positive with a refractive index ranging from approximately 1.711 to 1.744; birefringence of 0.014 to 0.027; weak to moderate pleochroism in shades of pink and red
Hardness & Durability
Origin Region
Notable sources include Russia, Australia, Sweden, Madagascar, Peru, and the United States (Massachusetts, Colorado)
Hardness & Durability
Mohs hardness of 5.5 to 6.5; moderate toughness; susceptible to scratching by harder stones like quartz; fair wearability for jewelry if set in protective mounts
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid harsh chemicals, ultrasonic cleaners, and steam cleaners; store separately from harder gemstones to prevent scratching
Rarity & Value
Uncommon to rare depending on clarity and pattern quality; high-grade material with deep pink color and minimal black inclusions is valued higher; price ranges from affordable tumbled stones to moderate collector piece values
Special Characteristics
Distinctive black manganese oxide dendritic inclusions creating striking contrasting web-like patterns against the pink background
Lore & History
Historically used as a stone of emotional healing, compassion, and balancing energy. Often associated with the heart chakra in crystal healing traditions, though these are traditional beliefs and not scientifically proven