» Final Clean-up and Recovery of Your Gold
Since the sand is about 4 times lighter than the gold, it will blow off the paper a little at a time, leaving the gold behind. Once all the black sands are gone, you can pick out the pieces of platinum if present, and separate them from the gold. Pour the gold into the same gold sample jar used in the earlier steps.Getting Gold without Water | Western Australian Museum,The model was constructed on the cradle principle with its adjustable screens moving in a rocking motion. It included a pair of bellows to blast air, to separate the heavier gold from other material. The machine, designed to be carried on a horse or a camel, weighed 100How to Extract Grain-Sized Gold in Dirt? | Physics Forums,Aug 17, 2011· Density is the best test. Even gold dust sinks. We have a river locally that contains some placer gold, and when you agitate the pan, the regular sand and dirt wash out cleanly, leaving a reddish "sand" composed of weathered garnet, which also washes out, leaving a fine dense black material, AND (if you are lucky or skillful) gold.