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<p>[QUOTE=&quot;-jeffB, post: 24603925, member: 27832&quot;]Oh, yes. At the very least, it will probably attack the surface copper-oxide layer, and change the color of the coin, not for the better.</p><p><br /></p><p>If this is an old piece, it&#039;s less likely to be silicone anyhow, and more likely to be an animal glue, isn&#039;t it? In any case, I&#039;d start with a <i>distilled water</i> soak if I had to release the coin...</p><p><br /></p><p>...but as others have said, it probably holds more interest and value right where it is. Get the cent loose, and it will likely still look like an ex-jewelry (that is, &quot;damaged&quot;) cent, worth less than a dollar. Mounted as it is, it&#039;s an interesting and even attractive piece.[/QUOTE]</p><p><br /></p>

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