Natural SelectionIt’s application time again at the Diamond Trading Company.On March 8, the De Beers Group’s sales and marketing arm announced it will begin processing sightholder applications for the 2012–15 period. Both existing clients and hopefuls for De Beers’ storied list must submit a contract profile questionnaire by July 7.This marks the DTC’s first sightholder selection since December 2007. The miner is looking to “refresh” its roster, according to Mahiar Borhanjoo, executive director of sales and sightholder services.“Will the new list comprise the same 70 [sightholders] we already have, or will there be companies that are better than those companies on the new list?” Borhanjoo asks. “It’s too early to tell.”While past selections have come with warnings that the list would be trimmed because of decreased rough output, Borhanjoo noted that near-term proj