| Crystal System |
Monoclinic |
| Chemical Comp.. |
KAlSi3O8 |
| Color |
Colorless |
| Pleochroism |
None |
| Cleavage |
Poor |
| Relief |
Low |
| Birefringence |
Gray/White |
| 2V | 66˚-103˚ |
| Optic Sign | Negative |
| Twinning |
Cross-Hatched |
Microcline (Mic) has distinctive cross-hatched twinning.
