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<p>[QUOTE=&quot;Sallent, post: 2825071, member: 76194&quot;]Well, being burried and having chemical reactions with the soil already damaged/interacted with the ions in the coin metal or whatever, so that shouldn&#039;t be much of a concern 2,000 years later even if you have a coin without patina. The worst I think would happen is the coin might get dark with toning, and then who cares as toning would just add protection.</p><p><br /></p><p>I can see it being a concern with modern coins where the aim is to maintain the original luster, hence turning the owners into obsessed neurotic zombies looking to encapsulate the coin in as many layers of plastic as possible.[/QUOTE]</p><p><br /></p>

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