The Deccan was rich in minerals, though its soil was not as fertile as that of the Gangetic plains. The copper mines of Cudappah, Bellary, Chanda, Buldhana, Narsingpur, Ahmadnagar, Bijapur and Dharwar were an important source of income and played an important role in the economy. Diamonds were mined in Cudappah, Bellary, Kurnool and Golconda; the capital Manyakheta and Devagiri were important diamond and jewellery trading centres. The leather industry and tanning flourished in Gujarat and some regions of northern Maharashtra. Mysore with its vast elephant herds was important for the ivory industry.