The Bakony and Vertes mountains contain 10 to 12 percent of the world's known bauxite reserves and deposits of manganese ore, the only alloy necessary for steel production found in Hungary. The only iron-ore mine, located at Rudabanya, produces ankerite and siderite that contain only 24 to 27 percent iron and require lime before smelting. In the late 1980s, the country's limestone and dolomite reserves satisfied the needs of its pig-iron industry. Copper mines at Recsk remained undeveloped in 1987 because of lack of financing and because of copper's low price on world commodity markets.
Data as of September 1989