Gold Spiral Classifier Washing Machines Sand Making
Gold Spiral Wheel Concentrators Gold Fever Prospecting. Gold with a specific gravity of 15 to 193 and black sands at 5 to 6 when properly screened down to approximately the same size will allow the gold to be easily separated using a good spiral wheel concentrator without proper screening classification with a sieve particles many times the size of the gold will climb the spirals and