Blackstone Minerals Limited announced the appointment of GR Engineering Services Limited (GRES) as the primary consultant in the delivery of the Upstream Definitive Feasibility Study ("DFS") for the Ta Khoa Nickel Project (TKNP). As the primary consultant GRES will focus on the delivery of major workstreams including process infrastructure, metallurgical test-work and co-disposal tailings storage. GRES will also co-ordinate, collaborate with and collate information from other key workstreams including mining studies.