Mineral Resources. Bihar is the principal holder of country's pyrite resources and possesses 95% of resources. The important mineral occurrences in Bihar are limestone in Kaimur (Bhabhua), Monghyr and Rohtas districts; mica in Nawada district; quartz/ silica sand in Bhagalpur, Jamui, Monghyr and Nalanda districts; quartzite in Lakhisarai ...