Calcite vs Kyanite
| Property | Calcite | Kyanite |
|---|---|---|
| Formula | CaCO3 | Al2SiO5 |
| Crystal System | Trigonal | Triclinic |
| Mineral Class | 05 Carbonates and Nitrates | 09 Silicates |
| Mohs Hardness | 3.0 | 4.5-7.0 |
| Color | Colorless, white, yellow, orange, blue, green | Blue, white, gray, green |
| Luster | Vitreous | Vitreous |
| Streak | White | Colorless |
| Transparency | Transparent | Translucent |
| Cleavage | Perfect rhombohedral {1011} | Perfect {100} |
| Fracture | Conchoidal | Splintery |