Sir when we see any mica with well defined layering, can we say it is foliated?. then what happen if it get metamorphosed? as its already foliated.

Yes, you can say well defined layering in mica as foliation. You should also remember that the foliation is generally used for metamorphic rocks. You can get Foliated mica in lower...

Mica can be formed from igneous process or Muscovite can form during the regional metamorphism of argillaceous rocks. The heat and pressure of metamorphism transforms clay mine...