De Beers
Trading of rough diamonds takes place through two channels – De Beers Global Sightholder Sales (GSS) and De Beers Auction Sales. GSS sells about 90% of De Beers' rough diamonds, by value, and features wholly owned and joint venture operations in South Africa (De Beers Sightholder Sales South Africa), Botswana (DTCB), and Namibia (NDTC). They sort, value and sell 33% (2013) of the world's rough diamonds by value.