South Africa's diamond industry began in 1867 after a child found a diamond beside this "colorful" river
But then they found them in Brazil; and in 1867, a boy 
named Erasmus... [DOC] [TLE] Mining Part 2: Important Minerals, Gems, and Rocks Mined in North ... [PAR] Jan 1, 2006 ... A form of aluminum oxide, second only to the diamond in hardness, found in 
Madison County in 1846.