<Tr> <Th> Location </Th> <Td> Bolivia, Potosí </Td> </Tr> <Tr> <Th> Parent range </Th> <Td> Andes </Td> </Tr> <P> Cerro Rico (Spanish for "rich mountain"), Cerro Potosí ("Potosí mountain") or Sumaq Urqu (Quechua sumaq beautiful, good, pleasant, urqu mountain, "beautiful (good or pleasant) mountain") is a mountain in the Andes near the Bolivian city of Potosí . Cerro Rico was famous for providing vast quantities of silver for Spain during the period of the New World Spanish Empire . The mountain, which is popularly conceived of as being "made of" silver ore, caused the city of Potosí to become one of the largest cities in the New World . </P> <P> After 1800, the silver mines were depleted, making tin the main product . This eventually led to a slow economic decline . At the start of the 20th century, liberal reforms and an increase in government policies favoring foreign investment led to a decrease in nationalization of natural resources and an increase in ownership by private companies . Almost immediately following the change in Peruvian mining code in 1901 that allowed for the privatization of mines, a New York - based company purchased "80 per cent of the mines in the Cerro de Pasco region of the central andes". </P>

What is the primary type of mining that takes place under the bolivian mountain