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<p>[QUOTE=&quot;-jeffB, post: 8393269, member: 27832&quot;]We obviously can&#039;t point an XRF gun at the coin through the screen, so we can&#039;t <i>measure</i> the coin&#039;s composition. (I don&#039;t have my own XRF gun anyhow, more&#039;s the pity.) Here&#039;s what we <i>can </i>see, though:</p><p><br /></p><p>The coin&#039;s rim is mashed down into the devices, the rim is <i>thicker</i> than usual, and the diameter is <i>smaller</i> than usual. That says that the coin has been <i>squeezed</i>, either by rolling or by being forced into a collar. From your edge photos (which are quite good), I&#039;d go with rolling. Look up &quot;spooning&quot; coins; it&#039;s a technique used when turning coins into rings.</p><p><br /></p><p>The coloring of this coin looks <i>exactly</i> like a zinc Lincoln cent that&#039;s had much of its copper layer abraded away. White in spots, grey where the zinc has corroded. The pattern of the grey areas on the obverse is a perfect little topographic map of the higher points on the coin&#039;s design, with the copper strip-mined away to reveal the zinc underneath.</p><p><br /></p><p>What did your jeweler do to test the coin&#039;s composition? If they were talking about scraping off a bit of it for testing, I assume they did <i>not</i> have an XRF tester. &quot;Not zinc, aluminum, or silver&quot; is an odd set of metals for a jeweler to list, though, and leaves me confused about what they actually did...?[/QUOTE]</p><p><br /></p>

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