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Microcline (KAlSi3O8) NS2503.01 |
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| Crystal system | monoclinic. |
| Habit | prismatic crystals frequently twinned which produces a cross-check or "tartan" look on the mineral face. |
| Cleavage | good to perfect. |
| Fracture | uneven. |
| Hardness | 6 |
| Specific Gravity | 2.54-2.57 |
| Color | white to pale yellow, and in rare circumstances red or green. |
| Luster | vitreous, transparent to translucent. |
| Streak | white. |
| Distinguishing features | the cross-checked or "tartan" appearance is characteristic of microcline. |
| Uses | green variety is polished and formed into beads for use as jewelry. |
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