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<p>[QUOTE=&quot;GDJMSP, post: 24575554, member: 112&quot;]It&#039;s really hard to tell from your pics but I don&#039;t see anything that makes me think the coins have been harshly/improperly cleaned - which is what I assume you mean when you say &quot;cleaning&quot;.</p><p><br /></p><p>That said, there is a very well known coin cleaner called MS70 that can be easily purchased almost anywhere that is infamous for turning copper coins a blue or purple shade when it used on them. </p><p><br /></p><p>MS70 truly works wonders when it used on clad or silver coins and it is not detrimental to them in any way. But on copper, it&#039;s a big no-no ! I&#039;d bet a lot that&#039;s what happened to those coins.</p><p><br /></p><p>One also needs to understand that it&#039;s not at all uncommon for high AU or better copper coins to naturally tone various shades of blue or purple. But coins with more than very light wear on them, well circulated coins like those you posted - do not. Well circulated copper coins very, very rarely tone any color other than brown.[/QUOTE]</p><p><br /></p>

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