Mica is a non-conductor of electricity. Due to its excellent di-electric strength, low power loss factor, insulating properties and resistance to high voltage, mica is an indispensable mineral for the electrical and electronics industries. Koderma-Gaya-Hazaribagh belt of Jharkhand is the leading mica-producing area of India. In Rajasthan, the major mica-producing area is around Ajmer. In Andhra Pradesh, the Nellore mica belt is an important mica-producing area.