| Mineral class: | Nesosilicate |
| Composition: | Alumino-silicate, Al2SiO5 |
| Hardness: | 5 along cleavage plane; 6.5 - 7 across cleavage plane |
| Luster: | Vitreous |
| Color: | White to light blue |
| Streak: | White |
| Cleavage: | One perfect cleavage plane, parallel to length of crystals |
| Crystal form: | Long, bladed or tabular crystals |
| Comments: |
![[kyanite.jpg]](kyanite.jpg) |