Sub-Saharan Africa is rich in minerals. The region is a major exporter to the world of gold, uranium, chrome, vanadium, antimony, coltan, bauxite, iron ore, copper and manganese. South Africa is a major exporter of manganese. South Africa is also a major supplier of chrome. About 42% of world reserves and about 75% of the world reserve are located in South Africa. In addition, South Africa is the largest producer of platinum. 80% of the total world's annual mine production is from South Africa. 88% of the world's platinum reserve is in South Africa. Sub-saharan Africa produces 33% of the world's bauxite with Guinea as the major supplier. Zambia is a major producer of copper. Democratic Republic of Congo is a major source of coltan. Production from Congo is very small but has 80% of proven reserves. Sub-saharan Africa is a major producer of gold, producing up to 30% of global production. Major suppliers are South Africa, Ghana, Zimbabwe, Tanzania, Guinea, and Mali. South Africa had been first in the world in terms of gold production since 1905 but in 2007 it moved to second place, according to GFMS, the precious metals consultancy. Uranium is major commodity from the region. Significant suppliers are Niger, Namibia, and South Africa. Namibia was the number one supplier from Sub-Saharan Africa in 2008.