'History in the making': Largest diamond in over a century discovered

Biggest diamond in over century found in Botswana - a whopping 2,492 carats

The largest diamond found in more than a century has been unearthed at a mine in Botswana, and the country's president showed off the fist-sized stone to the world at a viewing ceremony.

Botswana president reveals world's second largest diamond

Botswana President Mokgweetsi Masisi shows reporters a massive 2,492-carat diamond -- the second largest ever found in the world -- that was discovered in the north east of the country by a Canadian..