How to preforming gemstones for watches

We are working on Gemstones like cubic zircon, emerald and quartz whose size ranges from 0.5 to 1 mm. We used these gemstones in watches. We got all machines like swiss or other but the problem is that during pre-forming there is something wrong in it. Please let us know if there is any other machine… Kindly help out for sorting this problem.