A diamond is forever when we all work together, new De Beers Group CEO Al Cook opined sagaciously in his welcome address at the grand opening of De Beers’ Sightholder Sales South Africa at Sky Park, close to the OR Tambo International Airport. De Beers Sightholder Sales South Africa officially unveiled its new rough diamond sorting, valuation and sales facility on May 19 at an event attended by Mineral Resources and Energy the Minister Gwede Mantashe and Gauteng Economic Development MEC Tasneem Motara.