The Goldnews.com reports on tungsten gold rumors:
That tungsten was cited as the culprit is no surprise, because it’s the metal of choice if you want to imitate a big chunk of gold. Put some gold plating on tungsten and it will fool all the cheap, non-invasive tests, such as specific gravity, surface conductivity, scratch and touch stone. For a conclusive result, you have to drill into the bar, take a core sample, and submit it to more sophisticated verification techniques – fire assay, optical emissions spectroscopy, or X-ray fluorescence – and that involves a lot of time, trouble, and expense.
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