Key TakeawaysAngloGold Ashanti agreed to buy Centamin for $2.5 billion to boost its gold mining portfolio in Africa.AngloGold is paying Centamin shareholders $0.125 in cash and 0.06983 shares in stock.The deal gives AngloGold the largest gold mine in Egypt. Shares of AngloGold Ashanti Plc (AU) tumbled Tuesday after the gold miner announced a deal to buy smaller rival Centamin for $2.5 billion in cash and stock. AngloGold will pay Centamin investors $0.125 in cash and 0.06983 in new AngloGold Ashanti shares ...