Assam is surrounded by six of the other Seven Sister States: Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, and Meghalaya. Assam has petroleum, natural gas, coal, limestone and other minor minerals such as magnetic quartzite, kaolin, sillimanites, clay and feldspar. Assam produces up to 25% of India's petroleum needs. Assam produces a significant part of the total tea production of the world. Cultural places include the temple of Kamakhya, the pilgrimage place Hajo, the great Vaishnava Sattras of Majuli and Barpeta.