Scoria
Scoria is a rock with the chemical formula n/a. It has a Mohs hardness of 5-6 on Mohs scale and glassy to dull luster.
Scoria properties
| Type | Rock |
|---|---|
| Chemical formula | n/a |
| Mohs hardness | 5-6 on Mohs scale |
| Luster | Glassy to dull |
| Typical colors | Typically dark (black, dark gray, or reddish) |
| Formation | Forms from the cooling of molten lava that escapes as gas during volcanic eruptions |
| Rarity | 4 / 10 |
Mohs hardness 5–6 — fairly hard
1 · Talc5 · Apatite10 · Diamond
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