Kyanite
Physical Properties
| Color | blue |
| Form/Habit | bladed |
| Lusture | pearly |
| Streak | white |
| Hardness | 5-7 |
| Cleavage | perfect 2 sets |
| Fracture | uneven |
| Specific Gravity | 3.60 (moderate) |
| Chemical Composition | Al2SiO3 |
| Crystal System | triclinic |
| Diagnostic Properties | bladed form, 2 sets of cleavage |