Template:Hematite
From The Gemology Project
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 |