Petra Diamonds Ltd. engages in diamond mining and supplies rough diamond to the international market. Its projects include Finsch, Cullinan, Koffiefontein, Kimberley Underground, Helam and Williamson. The company operates through two segments: Mining and Exploration. The Mining segment engages in the extraction and sale of rough diamonds from mining operations in South Africa and Tanzania. The Exploration segment consists of exploration activities in Botswana. Petra Diamonds was founded by Adonis Pouroulis in March 25, 1997 and is headquartered in St. Helier, the United Kingdom.