India has the largest deposits of mica in the world. Mica is a mineral that is widely used in various industries such as electronics, cosmetics, and construction. India's mica deposits are found in abundance in the states of Jharkhand, Bihar, and Rajasthan. The country accounts for a significant portion of the global mica production, making it the largest producer and exporter of mica. The presence of large deposits of mica in India contributes to the country's economy and makes it a key player in the global mica market.