| Mineral | Schorl |
|---|---|
| Formula | NaFe2+3Al6(BO3)3Si6O18(OH)4 |
| Crystal Form | Trigonal/Ditrigonal Pyramidal [3m] |
| Cleavage | [1011] Indistinct |
| Color | Black, Brownish black, Greenish black, Bluish black |
| Density | 3.1 – 3.2 g/cm3 |
| Diaphaneity | Opaque |
| Fracture | Brittle - Conchoidal |
| Hardness | 7.5 |
| Lustre | Vitreous |
| Streak | Brown |
| Dana 8 Class | 61.3.1.10 |
| Strunz Class | VIII/E.19-50 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 95 |