Most often the indigenous platinum is found in secondary deposits in alluvial deposits. The alluvial deposits used by pre-Columbian men and women while in the Chocó Section, Colombia remain a source for platinum-team metals. An additional substantial alluvial deposit is during the Ural Mountains, Russia, and it is still mined.[fourteen] http://holdenbmwfo.blogstival.com/3502414/5-tips-about-platinum-you-can-use-today