A crater 2,500ft wide and 1,600ft deep... all to extract a pile of diamonds the size of a BEACH BALL (but they are worth hundreds of millions of dollars)
http://www.dailymail.co.uk/news/article-3078478/A-crater-2-500ft-wide-1-600ft-deep-extract-pile-diamonds-size-BEACH-BALL-worth-hundreds-millions-pounds.html