Bust out your tinfoil hats fellas. What you are talking about is dowsing. I have extensively researched parapsycology studies carried out by the US government and others. Dowsing was studied not for water, but for intelligence purposes in project stargate run by the CIA at stanford research institute. There was an official program for over 20 years which included dowsing and remote viewing. The US first got interested in these types of topics during the cold war as the USSR was heavily vested in these types of issues. I don't want to be kicked out for being crazy so you can do your own research at cia.gov and nsa.gov. I don't think it has anything to do with the metallic composition from what I have come to understand. It's more about quantum physics and being able to percieve information thru untraditional means.
