RE:De Beers reveals handful of diamond secrets to woo investorsMarine2, nice article about Anglo and De Beers! As good as de Beers diamond business appears to be, as the article points out, de Beers is only part of Anglo's mining business which is primarily copper, coal, and iron ore. With Mountain Province, we get a pure gem-quality diamond play! We are almost through the final obstacles, consisting of financing and land use permit.