Mining of gold, nickel and iron ore also occurs. It transported coal, mined ore, and passengers. Chromium is mined as chromite (FeCrO) ore. Coal was used to run furnaces for the smelting of metal ore. The country has significant amounts of lithium, copper, gold, coal, iron ore, and other minerals. It is mined as the main ore of iron. Interspersed with the coal seams are deposits of iron ore and fireclay. Bauxite is the most important aluminum ore. The mining involves moving tremendous amounts of ore and waste. It is also rich in diamonds, manganese ore, bauxite, and oil. The chief ore of aluminium is bauxite. Minerals included gold, gems and iron ore. Together these constitute 90% of mined boron-containing ore. The total movement of ore and waste constitutes the mining process. Smelting involves more than just melting the metal out of its ore.