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<p>[QUOTE=&quot;Michael K, post: 3845931, member: 78298&quot;]If you have a 90&#039;s cent that weighs 3.1, then it could be copper.</p><p>Which would be a rare find. Not impossible, but unlikely.</p><p>You&#039;ll&nbsp; have to make sure the scale is accurate and calibrated correctly</p><p>(by weighing copper coins at 3.1 and zinc coins at 2.5 and then your coin again at 3.1). You must also determine that your coin has not been altered in any way. It&#039;s possible the date took a hit and looks like a 90&#039;s coin when it is an earlier copper coin (from the 70&#039;s or whatever). Also that weight hasn&#039;t been added in any way.</p><p>It could still be zinc which would be a thicker rolled planchet.</p><p>Clear decent sized photos of both sides are mandatory to try to get some visual evidence.[/QUOTE]</p><p><br /></p>

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