Koderma, in Jharkhand, is the leading producer of which
Koderma district is rich in minerals. The Koderma district and the LokaiIndarwa area covers the southern part of Great MicaBelt of Jharkhand, Bihar, and India. Previously the Mica belt was known as Bihar mica belt which extends for a distance of 160 km having an average width of 25 mica belt stretches from Gurpa in Gaya district in the west through Nawada, Koderma, Hazaribagh, Giridih