In the alluvial regions of Australia, people use Minelab metal detectors to find gold nuggets. There are people who make a living detecting gold in this manner. Many of them are "ferals" living in remote areas of Cape York. I almost purchased a detector when I was cruising Australia just to have some fun detecting gold when driving in the hinterlands of OZ in my Defender 130 Land Rover. Maybe I will do some detecting next time around. I still have my Defender, so all I need is the time, and the detector.