1 Orthopaedics-the diagnosis and treatment, including surgery, of diseases and disorders of the musculoskeletal system, including bones, joints, tendons, ligaments, muscles and nerves. 2  Otolaryngology-the medical and surgical care for diseases of the ears, nose and throat (ENT).
Gold, diamonds, cobalt, copper and oil are major resources that are mined from the region; most mining is small scale, artisanal, and unregulated. Recently, mining groups have targeted coltan and cassiterite, rare minerals used in electronics such as mobile phones.
Silver mining is the resource extraction of silver by mining. Silver is found in native form very rarely as nuggets, but more usually combined with sulfur, arsenic, antimony, or chlorine and in various ores such as argentite (Ag 2 S), chlorargyrite (horn silver, AgCl), and galena (a lead ore often containing significant amounts of silver).