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<p>[QUOTE=&quot;TypeCoin971793, post: 2508793, member: 78244&quot;]The easiest way to tell if a coin has been cleaned is if brown bronze is showing in the fields, or if there is &quot;brassing&quot; (causing the copper to look &quot;red&quot; again) on the high points of the design. Your Huo Quans have been cleaned. The dirt has been cleaned off your Wu Zhu (you would expect there to be dirt if the coin was found in the ground, right?), but the patina is untouched.</p><p><br /></p><p>When patina cannot be used for authentication, one has to use calligraphic style, the presence of wear, minting style (crude, artfully-made, etc.), metallic composition (sometimes the color of the metal can give away fakes), and overall fabric of the coin in question.[/QUOTE]</p><p><br /></p>

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