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<p>[QUOTE=&quot;montynj3417, post: 4608259, member: 89220&quot;]I am a metal detectorist whose specialty is contemporary American coins. WITHOUT EXCEPTION, every nickel that I&#039;ve found and dug up, that had been in the ground for awhile, was brown, and had the appearance of a copper coin. Many of the dimes and quarters I&#039;ve recovered, with an outside surface of nickel, were also brown. When I brush them clean with a small steel bristle brush (anyone need CPR?, Heimlich?... a gin &amp; tonic?), they generally clean up to a nice, bright, shiny silvery appearance, and the bank is very happy with them when I cash them all in, for face value.</p><p>If you&#039;re convinced that you have a copper nickel, place a drop of nitric(?) acid on an unobtrusive spot and see the color you get. If indeed you have struck copper, it will be greenish; nickel, more blue, black or even orangey-red. Anyone who finds me deficient on the details of this test or its possible outcomes, please put down your gin &amp; tonic and bring us up to speed.[/QUOTE]</p><p><br /></p>

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