Hands don't have a magnetic field or any magnetic properties to speak of. In any event, you could test the idea you're suggesting just by waving any conductor over your hand. I tried it with a tea spoon, and a metal ruler. Nothing. I also tried a stack of neodymium magnets, which I get a huge Lenz drag from with aluminum or copper. Nothing from my hand.I don't know the answer, and have found the replies interesting. I'm wondering if the quartz crystal has anything to do with it. Copper is a good electrical conductor. Hands have magnetic properties (I'm assuming). We know that moving a conductor about a magnet, or vice verse, produces measurable effects. Is that all there is to it? I have no idea.