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<p>[QUOTE=&quot;medoraman, post: 1217702, member: 26302&quot;]Proof of that is ancients. I have a couple of blue copper ancients, (bronze but incomplete mixture). I actually have more ancient artifacts blue, since the artifacts are more pure copper oftentimes. To me it appears blue is a stage before it gets the hard green patina commonly found on copper ancients. I don&#039;t think they were MS70ing back then.</p><p><br /></p><p>Blue is a rare color usually, but their existence I believe proves under certain circumstances it can be NT. Do I believe US coins toned even blue are NT? No, but have seen some dug up from metal detectorists that were brown/blue or green/blue I believe are NT.[/QUOTE]</p><p><br /></p>

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