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<p>[QUOTE=&quot;otlichnik, post: 5833015, member: 109731&quot;]A coins colour today will be based on:</p><p><br /></p><p>Original metal alloy + burial condition (soil, water, adjacent chemicals) +&nbsp; cleaning methods used + (if you are looking at a photo) photography (method, lighting, after photo edits and adjustments).</p><p><br /></p><p>In short there is no simple answer.</p><p><br /></p><p>Your second batch has been cleaned chemically.&nbsp; The chemicals ate through much of the green (etc) corrosion products, though some remains as a faint green &quot;shadow&quot;.&nbsp; Hard to tell if the brown coloured copper was first reduced to shiny copper and then re-toned or whether the chemical treatment left it as is.</p><p><br /></p><p>The upper lot is either a result of a few different cleaning methods or of a few different patina types cleaned by one method.</p><p><br /></p><p>SC[/QUOTE]</p><p><br /></p>

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