Kyanite
Kyanite is a mineral with the chemical formula Al2SiO5. It has a Mohs hardness of 4.5 to 7 and vitreous to pearly luster.
Kyanite properties
| Type | Mineral |
|---|---|
| Chemical formula | Al2SiO5 |
| Mohs hardness | 4.5 to 7 |
| Luster | Vitreous to pearly |
| Typical colors | Blue, green, black, white |
| Formation | Metamorphic environments, typically in schist and gneiss |
| Rarity | 6 / 10 |
Mohs hardness 4.5–7 — hard
1 · Talc5 · Apatite10 · Diamond
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