title: NATIONAL MINERAL RESOURCES – A GUARANTEE OF INDEPENDENCE AND SECURITY
abstract: Kyustendil region, Bulgaria has a rich history in the extraction of gold, silver, copper, lead, zinc, iron, tin, coal, and mineral waters. Data and considerations for the search for polymetallic, tin, mercury, tungsten-molybdenum, ores of rare and scattered elements and fluorite ores, as well as coal, gas and oil is presented, but there are also rock facing and construction materials, raw materials for ceramics and precious stones, and etc. The history of prospecting and extraction of ores and c