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<p>[QUOTE=&quot;desertgem, post: 1535698, member: 15199&quot;]Tungsten can not be readily cast into bars due to its high melting temperature, so is chemically produced in a powdered form which is molded using adhesives or lesser dense metals. This powdered form ( not being a continuous piece such as melted/cooled gold alloy) and being separated by a low density adhesive reacts very differently to wave form transmission than a solid gold alloy. The larger bars in commodity exchange and supposedly in government storage have probably been checked often as the equipment does not have to be overly complicated and expensive, but not common either. It is on the level of a doppler scan device. If the necessity increases, there will be a laptop device. Theoretically ( I have not researched this), if a &quot;ping&quot; of the object is fed into a microphone and audio editing program, there should be a difference in waveform between a gold bar and a gold plated tungsten bar. AIMO.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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