The caste system has evidently been more flexible, in terms of appropriate work for Brahmins, than one might expect. Records from the classical and medieval periods in India mention men of the Brahmin class performing work other than carrying out priestly duties or teaching about religion.
Spanish conquerors discovered that South America was home to rich veins of silver and silver ore, and they mined that wealth enthusiastically; according to the Silver Institute, an industry trade group, 85 percent of the silver produced worldwide came from Bolivia, Peru and Mexico between 1500 and 1800.
Native copper can be found in alluvial deposits, granitic and basaltic rock. The biggest ores of copper are the minerals chalcopyrite and malachite. Copper is mined throughout the world and the open pit mines created are the largest man-made excavations in the world.The top copper mining countries are Chile, U.S.A., Peru, China, Australia, Indonesia, Russia, Canada and Zambia.Copper is found in many other countries as well, it's a pretty extensive list.he top copper mining countries are Chile, U.S.A., Peru, China, Australia, Indonesia, Russia, Canada and Zambia. Copper is found in many other countries as well, it's a pretty extensive list.