I know this has been mentioned here many times but perhaps some new members will appreciate the information. http://www.zerohedge.com/news/2013-08-16/gold-or-tungsten-heres-how-know Thanks zerohedge
good work GP you passed the test! "A handful of men have become very rich by paying attention to details that most others ignored." Henry Ford (1864 1947) U.S. founder of Ford Motor Company
I bought one of these recently: http://www.ebay.com.au/itm/Ultrason...21187228052?pt=AU_Gadgets&hash=item4ac8402994 Depending on what you're trying to check (coin or bar, and depending on size), they're not too bad. All I really need now is a fake bar to test the results on
You could always make a fake one - maybe place a sheet of alfoil between two bars and test that against two bars of straight metal If that doesn't work, perhaps a thicker plate of metal. I'd guess it would give you some idea.