| These crystals were abundant in a very micaceous pegmatitic rock composed of muscovite, albite, and quartz with accessory schorl crystals. |
| Here it was associated with quartz, albite, schorl, muscovite, and microcline in the intermediate zone. |
| Mylonitic rocks usually have ribbon quartz and rotated albite porphyroclasts. |
| The quartz and albite contain small dark inclusions of cassiterite and columbite-tantalite-group minerals. |
| Typical minerals in this facies are quartz, albite, prehnite, pumpellyite, chlorite, stilpnomelane, muscovite, and actinolite. |
| A plagioclase feldspar, albite probably, occurs as parallel growths of transparent colorless to yellowish crystals. |
