Star Diamond locks horns with Rio Tinto on diamond breakage study February 22, 2021 Topics Diamonds recovered from Star-Orion South. Credit: Star Diamond Star Diamond (TSX: DIAM) has provided an update on the progress of a 10 cutter-hole bulk sample program completed by joint venture partner Rio Tinto Exploration Canada on the Star kimberlite at the Star-Orion South diamond project in Saskatchewan. The two partners are With Rio Tinto advising Star Diamond that the bulk sample program has been completed (which includes processing, diamond recovery and results reporting), the junior notes that it has advised its JV partner in writing that a “comprehensive diamond breakage study” as well as certain other work items remain outstanding. Until these are completed, Star Diamond will not consider the ten cutter bulk sample program complete.