Processing plants had arrived at Baoulé ahead of schedule, while base camp and road upgrades were complete and plant construction in progress. An environmental impact study was also in progress.
Karl Smithson, chief executive, said: "Stellar has made tremendous progress over the past few weeks towards our objective of bringing the Baoulé kimberlite pipe into trial mining and generating early cash flow in Q4 2014.
"Both our Mandala 100tph DMS and the Droujba Bulk Sampling DMS plants have now been relocated to the Baoulé site.
"Our team on the ground has made strong headway with the re-assembling of the plants, and I am delighted to confirm we are on track for commissioning in early September.
“The diamondiferous Baoulé pipe is located in the heart of the world famous Aredor diamond fields, a region that has historically produced some of the largest and highest value gem diamonds in Guinea," he added.
The Ebola virus outbreak so far had not affected the operation at Baoulé nor Tongo in Sierra Leone, he said, though a number of precautionary initiatives to mitigate had been instigated.