16.40: Hematite
- Page ID
- 4724
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| Hematite | |
|---|---|
| Chemical composition | Fe2O3 |
| Crystal system | Trigonal |
| Habit | Tabular to thick crystals; micaceous or platy, commonly in rosettes; radiating fibrous, reniform, botryoidal or stalactitic masses, columnar; earthy, granular, oolitic |
| Cleavage | None, may show partings on {0001} and {1011} |
| Fracture | Uneven to sub-conchoidal |
| Hardness | 5.5–6.5 |
| Refractive index | nω = 3.150–3.220, nε = 2.870–2.940 |
| Specific gravity | 5.26 |
| Lustre | Metallic |