The process to pruduce "Polycrystalline synthetic diamond powder"   pretty complicated. Polishtec selling  only best  material after many tests that check this powder.What is pollycrystalline?Polycrystalline  powder  produced by short powerful explosion. that transform graphite into diamonds.By using this powder you get some advanatges :1.Fast removel material , much faster than other powders.2.Minimal  rough-  after polishing or lapping  the surface will be very smooth.