Although mining in Nepal was an ancient occupation, the country's mineral resources have been little exploited. Mining and quarrying accounted for 0.5% of GDP, and was dominated by the production of cement, red clay, coal, limestone, dead-burned magnesia, and marble. Mineral commodities accounted for 8% of Nepal's export earnings. In 2000, the country also produced small quantities of agricultural lime, quartz, quartzite, salt, sand and gravel, stone, talc, and tourmaline. A lead and zinc deposit near Lari had reserves of 2 million tons, and there were known deposits of iron, copper, graphite, cobalt, mica, and slate. Development plans included the encouragement of small-scale mining, and provided for continuing mineral surveys.