Calcite
mineral · common
Quick facts
- Formula
- CaCO3
- Hardness
- 3
- Luster
- Vitreous to pearly
- Colors
- White, colorless, yellow, orange
Soft carbonate mineral. Reacts immediately with dilute hydrochloric acid or strong vinegar.
Hardness 3 and rhombohedral cleavage separate it from quartz. Many "mystical" shop stones labeled quartz are actually calcite.
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