Rio Tinto has rescheduled its tender of run-of-mine rough diamonds from the Diavik deposit in Canada due to reduced production volumes. Originally set for September 30 to October 2, the sale has been postponed until after the Diwali holiday, which runs from October 31 to November 1, the company informed Rapaport News. Patrick Coppens, general manager of sales and marketing for Rio Tinto’s diamond unit, explained, “Geotechnical challenges at the mine in July and August