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<p>[QUOTE=&quot;Just Carl, post: 386711, member: 4552&quot;]AHHHH, there is that Verdigris statement again. Note Verdigris is a substance formed from Copper contacting an Acetate. Not as common as one thinks and just a term overly used such as PVC contamination. Green discoloration on anything Copper is basically as noted by rhoggman. Although the amount of Sulfides and Sulfates is also pending on the invironment. Midwest areas where steel mills once flourished is a common place for such reactions but in dryer, none sulfinated coal burning areas, that Sulfating is just not common. </p><p>Basically what you have is probbaly just normal starting of the Oxydation process and as long as no additional air can get to that coin, no more problems. If you purchase such a coin, make sure you have a return policy. Even so called air tight slabs can leak.[/QUOTE]</p><p><br /></p>

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