Rhodochrosite
Rhodochrosite · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal; usually occurs in massive, botryoidal (grape-like), or stalactitic habits, rarely as rhombohedral crystals.
Mineral Group
Carbonates (Calcite Group)
Chemical Formula
MnCO3 (Manganese Carbonate) with possible Fe, Ca, Mg substitutions
Formation Process
Hydrothermal origin in low to medium-temperature ore veins, or as a secondary mineral in manganese-rich sedimentary deposits.
About This Crystal
Visible beneath the metal chain as a pinkish-red base; characterized by translucent-to-opaque pink color with characteristic white/cream-colored banding or 'swirls'.
Physical Characteristics
Color: Pink to deep red with white streaks; Streak: White; Cleavage: Perfect rhombohedral in three directions; Fracture: Uneven to conchoidal; Luster: Vitreous to pearly.
Optical Properties
Refractive Index: 1.597–1.816; Uniaxial negative; Strong birefringence; typically shows no pleochroism in massive forms.
Hardness & Durability
Origin Region
Capillitas mine (Argentina), Sweet Home mine (USA), South Africa, and Peru; formed in hydrothermal veins.
Hardness & Durability
Mohs hardness: 3.5 to 4.0; Brittle tenacity; very low durability for rings; sensitive to acids and heat.
Care & Maintenance
Avoid chemicals (especially acids), ultrasonic cleaners, and steam; clean with warm soapy water and soft cloth; store separately to avoid scratches.
Rarity & Value
Common in massive form, extremely rare and valuable in gem-quality transparent red crystals; value depends on color saturation and pattern.
Special Characteristics
Displays distinctive concentric banding in stalactitic varieties; may show weak pink fluorescence under long-wave UV light.
Lore & History
Known as 'Inca Rose' (Rosicler); ancient Incas believed it was the solidified blood of their ancestral rulers. Associated with the heart chakra and emotional healing.