PRODUCTION would be disrupted for a day at Petra Diamonds’ Cullinan mine, east of Pretoria, following a “scaling” incident at the mine’s open pit section, but the company did not anticipate a significant impact on output numbers. Petra has guided to full year production of about 3.8 million carats. Scaling, normally used to refer to … Continue reading Petra Diamonds says no production impact after 3 million tons of rock collapse into open pit