Limestone
Limestone is a rock with the chemical formula CaCO3. It has a Mohs hardness of 3-4 and earthy to dull or vitreous luster.
Limestone properties
| Type | Rock |
|---|---|
| Chemical formula | CaCO3 |
| Mohs hardness | 3-4 |
| Luster | Earthy to dull or vitreous |
| Typical colors | White, gray, yellow, brown, and black |
| Formation | Sedimentary rock formed primarily from the accumulation of shell, coral, algal, and fecal debris |
| Rarity | 3 / 10 |
Mohs hardness 3–4 — soft
1 · Talc5 · Apatite10 · Diamond
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