Rhodonite
Rhodonite (Manganese silicate) · Semi-Precious Gemstone / Decorative Mineral
Crystal System
Triclinic; often occurs in massive, granular, or rounded crystalline aggregates. In this specimen, it has been carved into a prismatic wand shape.
Mineral Group
Silicates; specifically a Inosilicate (pyroxenoid group).
Chemical Formula
(Mn2+,Fe2+,Mg,Ca)SiO3
Formation Process
Metamorphic. Usually forms when manganese-rich sediments or igneous rocks undergo regional or contact metamorphism, often in hydrothermal environments.
About This Crystal
The specimen is an opaque, rose-pink to brownish-red stone with characteristic black dendritic veins and patches. It has been polished into a double-terminated hexagonal wand, approximately 6.5 cm in length. The luster is vitreous to dull.
Physical Characteristics
Color: Pink to red with black inclusions; Streak: White; Cleavage: Perfect in two directions (though not visible in polished form); Fracture: Conchoidal to uneven; Specific Gravity: 3.5–3.7; Fluorescence: Non-fluorescent to weak red under SW UV.
Optical Properties
Bi-axial positive; Refractive Index: 1.716–1.752; Birefringence: 0.010–0.015; Pleochroism: Weak (red, pink, yellow-red). Generally opaque in massive form.
Hardness & Durability
Origin Region
Notable sources include Russia (Ural Mountains), Australia (Broken Hill), Brazil, Peru, and the USA (New Jersey). Formed primarily in metamorphic manganese ores.
Hardness & Durability
Mohs hardness: 5.5–6.5. Toughness is generally good due to its compact crystalline structure, but it is somewhat brittle compared to jade.
Care & Maintenance
Clean with warm soapy water and a soft cloth. Avoid ultrasonic cleaners and harsh chemicals (acids). Store separately to prevent scratches from harder stones like quartz.
Rarity & Value
Common to Uncommon. Value is determined by the vibrancy of the pink color and the pattern of the black manganese oxide inclusions. Carved wands of this size are affordable decorative items.
Special Characteristics
The most distinctive feature is the presence of black manganese oxide veins (pyrolusite) that provide a high-contrast 'matrix' pattern against the pink base.
Lore & History
Historically used in Russia as a decorative stone for sarcophagi and jewelry. In metaphysical traditions, it is known as the 'Stone of Compassion,' associated with the heart chakra and emotional healing.