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Rhodochrosite (Photo) [abbr. Rds ]

Year of discovery: 1813 (Cavnic mine, Romania), 1891 (Japan)

Locality list: 1,001 localities of rhodochrosite

• MnCO₃
• [Mn²⁺][CO₃]^2-

• Class: Calcite group
• Class: Carbonate
• Soluble in: warm HCl (with bubbles)
• Alter to Pyrolusite by weathering.
• Substitution pseudomorph: Replaced by Manganite.

• Mn => Ca: Calcite (Series), Aragonite, Vaterite
• Mn => Mg: Magneiste
• Mn => Fe: Siderite (Series)
• Mn => Cd: Otavite
• Mn => Zn: Smithsonite
• Mn => Ni: Gaspéite (Gaspeite)
• Mn => Co: Spherocobaltite
• Mn => Ba: Witherite
• Mn => Sr: Strontianite
• Mn => Pb: Cerussite
• Mn => Na₂: Gregoryite

• Color: Pink, White, Pale brown
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Habit: Rhombohedral, Thin Platy

• Cleavage: Perfect on {1011} (3 planes)
• Hardness: 3.5-4
• Density: 3.7

• System: Trigonal
• Group: 3m, R3c
• Lattice: a=4.8, c=15.7

Etymology: Rhodon (Rose) -chrom (color) in Greek