| STAUROLITE |
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| Name | Staurolite |
| Formula | FeAl4Si2O10(OH)2 |
| Hardness (Mohs) | 7-7.5 |
| Density | 3.65-3.83 |
| Crystal System | Monoclinic |
| Colour | Red-brown to black-brown |
| Lustre | Vitreous, greasy lustre on cleavage surfaces |
| Overall size of mineral specimen | 63 x 22 x 45 millimetres |
| Size of individual crystals | 50 x 14 millimetres |
| Location | Kola Peninsula, Russia |
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