Biotite Mica
Biotite Mica is a mineral with the chemical formula K(Mg,Fe)3AlSi3O10(OH)2. It has a Mohs hardness of 2.5-3 and vitreous to pearly luster.
Biotite Mica properties
| Type | Mineral |
|---|---|
| Chemical formula | K(Mg,Fe)3AlSi3O10(OH)2 |
| Mohs hardness | 2.5-3 |
| Luster | Vitreous to pearly |
| Typical colors | Black, brown, green, or dark reddish-brown |
| Formation | Commonly found in igneous and metamorphic rocks, often associated with granite and schist |
| Rarity | 3 / 10 |
Mohs hardness 2.5–3 — soft
1 · Talc5 · Apatite10 · Diamond
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