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<p>[QUOTE=&quot;BR549, post: 1239153, member: 7110&quot;]Your going under the assumption that since both coins contain copper, 95% in the cent and 75% in the five cent piece, that they would oxidize resulting in the same coloration. You did not take into account the 25% nickel content in the 5 cent proof piece makes that coin way more corrosion-resistant to oxidation as opposed to the proof cent. </p><p><br /></p><p>These metal amalgams may appear consistent percentage wise, but metallurgically they are far, far apart. I&#039;m not a metallurgist, but I did sleep at a Holiday Inn Express last night.[/QUOTE]</p><p><br /></p>

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