Rhodonite
Rhodonite · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Triclinic; typically found in massive or granular habits; crystals are rare and usually tabular.
Mineral Group
Silicates (Inosilicates)
Chemical Formula
(Mn,Fe,Mg,Ca)SiO3
Formation Process
Metamorphic, frequently occurring in manganese-rich metamorphic rocks and hydrothermal replacement deposits.
About This Crystal
A pink to rose-red mineral often punctuated by black veins or dendritic patches of manganese oxide. It has a vitreous to pearly luster and is typically translucent to opaque.
Physical Characteristics
Color: Pink to brownish-red; Streak: White; Cleavage: Perfect in two directions; Fracture: Uneven to conchoidal; Specific Gravity: 3.5–3.7; Fluorescence: Generally none.
Optical Properties
Refractive Index: 1.716–1.752; Birefringence: 0.011–0.016; Pleochroism: Weak (red-pink to yellow-red); Optically Biaxial (+/-).
Hardness & Durability
Origin Region
Prominent sources include Russia (Ural Mountains), Australia (Broken Hill), Brazil, Peru, and the USA (New Jersey).
Hardness & Durability
Mohs Hardness: 5.5–6.5; Toughness: Fair to good (massive form is tougher than individual crystals); suitable for pendants but requires care in rings.
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid ultrasonic cleaners, steam, and harsh chemicals. Store separately from harder gemstones like quartz or sapphire.
Rarity & Value
Moderately common in massive form; transparent gem-quality crystals are very rare and valuable. Value is driven by color intensity and the aesthetic pattern of black inclusions.
Special Characteristics
Known for its distinctive 'veined' appearance caused by black manganese oxide inclusions (like pyrolusite), which often form dendritic patterns.
Lore & History
Historically used as a decorative stone in 19th-century Russia, especially for large vases and sarcophagi. Metaphysically associated with the heart chakra and emotional healing.