Colombia is one of the free market economies of the world. More reserves of natural and energy resources have helped the economy to a larger extent for attaining economy development. The economy of Colombia is mainly dependent on agriculture and coffee used to be a principal cash crop in the past. But later, Oil replaced coffee as nation's leading legal export. Colombia is rich in minerals, including petroleum, natural gas, coal, iron ore, nickel, copper, manganese, lead and mercury gold, emeralds, and platinum.