LSE-listed Gem Diamonds continues with the successful implementation of its business transformation programme, which is aimed at achieving $100-million in incremental revenue, productivity improvements and cost savings to the end of 2021. Reporting on the diamond miner’s results for the six months ended June 30, CE Clifford Elphick on Thursday said the company had already achieved $42-million in cost savings, net of implementation costs and fees, over the first 18 months of the programme.