Petra Diamonds Ltd. operates as an independent diamond mining group, which engages in supplying rough diamonds to the international market. Its projects include Finsch, Cullinan, Koffiefontein, Kimberley Underground, and Williamson. The firm operates through Mining and Exploration segments. 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 and South Africa. The company was founded by Adonis Pouroulis in March 25, 1997 and is headquartered in London, the United Kingdom.