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<p>[QUOTE=&quot;GDJMSP, post: 4060744, member: 112&quot;]Well, maybe MS70 was used on them. But here&#039;s the thing, copper coins can and do tone, and tone completely naturally, to various shades of blue and or purple. And a whole lot folks find them highly desirable !</p><p><br /></p><p>My point here of course is that short of using what they politely call a &quot;coin sniffer&quot; there is no way to tell one from the other.</p><p><br /></p><p><br /></p><p><br /></p><p>Yes, but it&#039;s difficult at best and a multi-step process.</p><p><br /></p><p><br /></p><p><br /></p><p>That may work, but the &quot;while&quot; is almost certainly going to be a looooooong while. And not one I would recommend because the coins would also be very likely to become contaminated with things you&#039;d much rather not have them be contaminated with.</p><p><br /></p><p>My question to you would be, why bother when the toning may well be perfectly natural to begin with ?[/QUOTE]</p><p><br /></p>

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