Middle Ages torture wouldn't be complete without this device, which was used to extract information out of a person. The head crusher has an upper cap, under which a person's head was placed, and a bottom bar, above which the chin was positioned.
This rock crusher does a fine job. It will crush small 2 in. X 2in. rocks into dust in a matter of a minute. Although very small pieces of rock remain intact, they are small enough to either use a pestle and mortar to pulverize them or leave them as they are and pan them separately You certainly will be able to recognize any possible gold still trapped within them..