I was given a Shakti Stone as a present from someone I helped to get hired for a job as a software engineer. I kept it for several years moving it here and there, trying to locate the power source on components so that I could put it on top. I heard nothing. Eventually I put it on eBay and got $175 for it from a guy in Japan. I threw it in a padded manila envelope and sent it off to him. I've never missed it.