Iron, chromium, copper, and gold mines.
Iron is the most widely used of all metals and accounts for about 95% of the total weight of metals produced worldwide. Its low cost and high strength make it indispensable for use in automotive manufacturing, shipbuilding, and as a structural component in buildings.
Chromium is used primarily in the metallurgy, chemical, refractory, and foundry industries, as well as in sectors such as automotive, kitchenware, and bathroom metals. In the metallurgical industry, the most important use of chromium ore is in the production of ferrochrome, which is used in the manufacture of stainless steel.
Copper is used as an electrical conductor in construction materials, in the composition of various metal alloys, in jewelry such as sterling silver, in marine equipment and coin production using cupronickel, and in constantan-based strain gauges and temperature-measuring thermocouples.
Gold has a wide range of uses. Due to its properties, it is used in the medical, electronics, automotive, defense, and aerospace industries. Gold does not react with other substances, which gives it excellent biocompatibility.