Pumice
Pumice is a rock with the chemical formula SiO2. It has a Mohs hardness of 5-6 and vitreous to dull luster.
Pumice properties
| Type | Rock |
|---|---|
| Chemical formula | SiO2 |
| Mohs hardness | 5-6 |
| Luster | Vitreous to dull |
| Typical colors | Light gray, white, yellow, or even brown |
| Formation | Igneous rock formed from rapidly cooled lava that trapped gas bubbles |
| Rarity | 4 / 10 |
Mohs hardness 5–6 — fairly hard
1 · Talc5 · Apatite10 · Diamond
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