Carbonates & Sulfates
Carbonate
What it is
Minerals built around the carbonate ion (CO₃). This family includes malachite (green copper carbonate), azurite (blue copper carbonate), rhodochrosite (pink manganese carbonate), and smithsonite (zinc carbonate). The metal cation determines the color.
How it forms
Most carbonates form in the oxidation zone of metal ore deposits, where carbonate-rich groundwater reacts with metal-bearing minerals near the surface. Malachite and azurite often occur together as copper ore weathers.
XCO₃ — Metal + Carbonate ion
Specimens
7 stones
Aragonite
Grounding · Root
Rapid growth from mineral-rich waters.
Azurite
Wisdom · Third Eye
Forms as copper-rich rocks 'rust.'
Cerussite
Transformation · Crown
Oxidation of galena (lead ore).
Magnesite
Calm · Crown
Alteration of magnesium-rich rocks.
Malachite
Transformation · Heart
Oxidation of copper ore bodies.
Rhodochrosite
Love · Heart
Stalactite growth in silver mines.
Smithsonite
Calm · Crown
Secondary mineral from zinc ore.