Mountain Goat Reverse Helix Trommel Concentrator
Classify your material into different sizes, Gold larger than 20 mesh can be picked the out with tweezers, and can be processed using a micro sluice or Gold wheel, i.e., Desert Fox, Gold Genie, etc. Gold smaller than 20 mesh calls for the Blue Bowl. After processing your concentrates with a Blue Bowl, place prescreened minus 20 mesh concentrates into a tumbler, add acidic acid "white vinegar ...