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<p>[QUOTE=&quot;Drusus, post: 163566, member: 6370&quot;]My spots didnt look like that, the coin was almost completely toned silver save for one spot of brighter yellow / orange [see pic]. I was told not to mess with it, that it wont spred. I was told that it might be caused by a bad mix in the alloy where there is more copper concentrated in spots and they corrode.</p><p>&nbsp;</p><p><img src="http://www.tribalsoup.com/coins/persiandetail.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p>&nbsp;</p><p><img src="http://www.tribalsoup.com/coins/persian01.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p>&nbsp;</p><p>dont know if this is similar but this spot hasnt spread.</p><p>&nbsp;</p><p>Like said GDJMSP said, it could also be where is was in contact for a long time with some other corrosive metal.[/QUOTE]</p><p><br /></p>

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