Where Are Micas Found

The world’s chief deposits of mica are found in India at Bihar and in the Nellore district of Madras. Over 50% of the mica used today comes from these two regions. Other major producers are Belgium, Brazil and China.

Where can you find biotite mica?

Biotite is a common rock-forming mineral, and is especially noted in metamorphic rocks such as schist and gneiss. It is also found in igneous rock such as granites and rhyolites. Biotite is also the primary mica in rare earth pegmatites.

How common is biotite?

It is a common rock forming mineral, being present in at least some percentage in many igneous rocks (e.g. granite and rhyolite), and metamorphic rocks (e.g. schist, gneiss).