Malachite
mineral · uncommon
Quick facts
- Formula
- Cu2CO3(OH)2
- Hardness
- 3.5–4
- Luster
- Silky to dull
- Colors
- Banded green
Copper carbonate hydroxide. Bright green banding is distinctive. Soft and dense.
Reacts weakly with acid. Do not wet-sand without dust control — copper minerals are toxic if inhaled.
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