I got one of these after seeing everyone rave about it. Took it right back. I put the batteries in and turned it on, the light came on and it seemed to be getting hot. As soon as I turned it to place the metal tip on top of the stone the batteries would move slide down in the compartment and the light would go out and it wouldn't work. I could see this being a problem not just confined to the one I bought, so I took it back and didn't get another one. It seemed cheaply made to me, I was really disappointed.