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<p>[QUOTE=&quot;Insider, post: 7937582, member: 24314&quot;]Randy Abercrombie, posted: &quot;Verdigris is the hard deposit I take it. The chemical process that eats our copper coins..... So what I am gleaning from this is that all green deposits are not necessarily verdigris then?&quot;</p><p><br /></p><p>From my reading &quot;Verdigris&quot; is the chemical reaction or the result of various chemical reactions so depending on how it is used, that word can be applied to virtually anything dealing with green colors, copper, or copper alloys.&nbsp; So, I guess this deposit qualifies to be called &quot;verdigris.&quot;&nbsp; <i><span style="color: #b30000">Right or wrong</span></i>, I call hard green deposits corrosion; however hard green corrosion (patina) is desirable on some coins - especially ancients.[/QUOTE]</p><p><br /></p>

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