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<p>[QUOTE=&quot;-jeffB, post: 3563601, member: 27832&quot;]I don&#039;t think so. An X-ray machine like that would never have the resolution necessary to discern a layer of silver plating.</p><p><br /></p><p>I don&#039;t know how much penetration it would get on copper vs. silver, and I doubt that it&#039;s calibrated in useful units -- the unit is supposed to show shapes of things, not measure how much the beam is attenuated at each pixel. You <i>might</i> be able to tell a difference in intensity between a silver-plated copper disk and a coin-silver disk, and if you had test blanks on hand (a known good dollar and a fake/mockup of known composition), you could compare your unknown to them. But I&#039;m betting it would just show that &quot;yep, they&#039;re all metal&quot;.[/QUOTE]</p><p><br /></p>

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