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<p>[QUOTE=&quot;Insider, post: 5245829, member: 24314&quot;]robp, posted: &quot;If you look at the brooch, despite there being no jewel detail left, there is still copper oxide(?) left within the circle. Looking at the olive branch or the A in the legend for example, some of the relief is wafer thin and thinner than you would expect, which is consistent with corrosion. The edge can now be seen to still have deposits within the finer detail. All those deposits are a result of the environmental conditions the coin was subjected to. How the deposits were removed is immaterial, because the loss of detail is down to chemical processes and that is where the damage was done. Nobody took an unworn mint state or close to coin and decided to tool it, whether by hand or with an electric tool. It was damaged to begin with.</p><p><br /></p><p>We&#039;ll probably have to agree to differ except on the point that it doesn&#039;t look good.&quot;</p><p><br /></p><p><i>Disagreement is fun.&nbsp; It&#039;s how folks with an open mind learn from others.&nbsp; When anyone has looked/collected enough <span style="color: rgb(179, 89, 0)">COPPER</span> alloy coins they will recognize that the <span style="color: rgb(0, 102, 51)">green</span> and black residues on your coin are dirt, and corrosion products.&nbsp; This is commonly seen on old copper and would probably come right off. </i></p><p><i><br /></i></p><p><i>If you still wish to call the coin corroded, that&#039;s fine as no one knows what it actually looked like before it was harshly whizzed and any possible corrosion was removed will a large amount of original surface. In cases as this, the whizzing describes the coin better than saying it has some rim dings.</i>&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" /></p><p><br /></p><p>PS you may wish to tell us how a &quot;CHEMICAL &quot; reaction can &quot;PUSH UP&quot; wave-like RIDGES on a metal surface.&nbsp;&nbsp; </p><p><br /></p><p><font size="1">Hint: It can&#039;t!&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie104" alt=":yawn:" unselectable="on" unselectable="on" /></font>[/QUOTE]</p><p><br /></p>

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