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<p>[QUOTE=&quot;Victor_Clark, post: 8054377, member: 10613&quot;]I submitted 22 coins to be analyzed using a scanning electron microscope as part of my master&#039;s thesis, The initial result was that the coins were moistly silicon. We decided that I needed to clear a small section of the surface contaminants (sand). I used a very small jewelers file and filed into the side edgewise and the results were much better.</p><p><br /></p><p>if you are interested it&#039;s the first appendix...scroll down to pg 115</p><p><br /></p><p>chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/viewer.html?pdfurl=http%3A%2F%2Fwww.constantinethegreatcoins.com%2FCONSTANTINE_THE_GREAT_THE_COINS_SPEAK.Pdf&amp;clen=2558134&amp;chunk=true</p><p><br /></p><p>my thesis was that old demonetized coins were melted down and used for the unofficial issues, which seemed to be true almost all the time[/QUOTE]</p><p><br /></p>

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