Rhodochrosite
Rhodochrosite · Collector Mineral / Semi-Precious Gemstone
Crystal System
Trigonal; typically occurs in massive, botryoidal, or stalactitic habits as seen in this rough specimen.
Mineral Group
Carbonates (Calcite group)
Chemical Formula
MnCO3
Formation Process
Hydrothermal provenance; forms in low to medium temperature hydrothermal veins and as a secondary mineral in sedimentary deposits.
About This Crystal
A rough mineral specimen featuring a pink to rose-red coloration with a grainy, uneven surface. It appears opaque to translucent with a vitreous to pearly luster on fresh surfaces.
Physical Characteristics
Color: Pink/Rose-red; Streak: White; Cleavage: Perfect rhombohedral in three directions; Fracture: Uneven; Specific Gravity: 3.5–3.7; Fluorescence: Occasionally weak red under SW UV.
Optical Properties
Refractive Index: 1.597–1.816; Birefringence: 0.219 (extremely high); Optically uniaxial negative.
Hardness & Durability
Origin Region
Notable sources include Argentina (Capillitas mine), South Africa (Hotazel), USA (Sweet Home Mine, Colorado), and Peru.
Hardness & Durability
Mohs Hardness: 3.5–4.0; Toughness: Poor; very fragile and sensitive to acids/heat; low wearability for jewelry unless protected.
Care & Maintenance
Clean only with warm soapy water and a soft cloth; avoid ultrasonic cleaners, steam, and acidic chemicals. Store separately to prevent scratching.
Rarity & Value
Common in massive form, but rare in high-quality transparent crystals. Value is driven by color intensity (deep red/pink) and transparency.
Special Characteristics
Often shows distinct white banding when polished (stalactitic variety); high birefringence; reacts with warm acids (effervescence).
Lore & History
Historically known as the 'Inca Rose' as the Incas believed it was the solidified blood of their ancestral rulers. In modern lore, it is associated with the heart chakra and emotional healing.