Aim-listed BlueRock Diamonds expects the operating time at its Kareevlei diamond mine, in Kimberley, South Africa, to increase by more than 30% after it shifted to a 365-day-a-year operation in March. This improvement will add to those improvements already achieved during the company’s 2018 financial year, ended December 31, during which it increased its diamond sales by 71% year-on-year to 5 805 ct.