Sri Lanka consists of a main island and a number of smaller islands. It is a developing economy based largely on agriculture, services, and light industry. The island is endowed with lots of natural resources and its mineral resources include titanium ore, graphite, kaolin, and gemstone with large deposits of unexploited iron ore. However foreign trade is an important segment of the Sri Lankan economy and the country is largest exporter of black tea in the world also being the third largest producer of natural rubber. Its free market ideology has one of the most liberal foreign trade regimes in the world and has encourage foreign investments in the country.