http://www.fisch.co.za/whatitdoes.htm I apologize if this has been posted before. It looks like a simple way to protect against some of the fake gold out there.
Interesting. Is this a sophisticated electronic instrument or a piece of plastic? If it's a hunk of plastic the price is prohibative.....
I have they show up as a "great new counterfeit detection tool" every so often and are sold to the "The sky is falling" gold bugs who don't really know what they are buying, just that they were told they shold buy gold. They buy their gold, then they hear a couple stories about counterfeits, and then they sell them these things. They do work, if you are only buying standard weight gold coins and you are only concerned about the gold content.