Please note: This riebeckite is not shaped asbesos like.
| Formula | Na2[(Fe2+;Mg)3Fe3+2]Si8O22(OH)2 |
| Origin | Thor Gar (Pakistan) |
| Description | sharp dark green Riebeckite crytals on matrix |
| Classification (Lapis) | Amphiboles |
| Crystal System | monoclinic |
| Hardness | 6 |
| Colour | lack, dark blue; dark blue to yellow-green |
| Streak | green to brown |
| Luminescence | none observed |
| Lustre | vitreous |
| Transparency (Opacity) | semitransparent |
| Cleavage | perfect |
| Fracture | conchoidal to unven |
| Magnetism | negativ |
| Geological Setting | In alkalic granites and syenites |
| Specific Gravity | 3,38 g/cm3 |
