Nagaland has a high literacy rate of 80.1 percent. The majority of the population in the state speaks English, which is the official language of the state. The state offers technical and medical education. Nevertheless, agriculture and forestry contribute a majority of Nagaland's Gross Domestic Product. The state is rich in mineral resources such as coal, limestone, iron, nickel, cobalt, chromium, and marble. Nagaland has a recoverable reserve of limestone of 1,000 million tonnes plus a largely untapped resource of marble and handicraft stone.