| Identification | |
| Colour | Light gray |
| Streak | Colorless |
| Luster | Vitreous |
| Hardness | 5,5-6 |
| Cleavage | Imperfect |
| Fracture | Splintery, uneven |
| Сrystal system | Мonoclinic |
Uses: Rock-forming mineral.
Deposits: Ural (in dolomites along the rivers Sanarka, Kamenka), in the Slyudyansky region (Baikal region), in Switzerland, in the Eastern Alps, etc.
Date of last changes:15.03.2019
