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<p>[QUOTE=&quot;Sulla80, post: 3378760, member: 99456&quot;]Thanks for the overview!&nbsp; Here&#039;s an interesting example of an isotopic analysis used to compare silver from Roman Republican coins pre- and post- 211 BC reform:</p><p><a href="https://www.geochemicalperspectivesletters.org/documents/GPL1613_noSI.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.geochemicalperspectivesletters.org/documents/GPL1613_noSI.pdf" rel="nofollow">https://www.geochemicalperspectivesletters.org/documents/GPL1613_noSI.pdf</a></p><p><br /></p><p>I have to say that the description of the method - with words like polishing, leaching, and extraction - doesn&#039;t&nbsp; make me want to push my favorite coin for analysis:</p><p><font size="3"><i>&quot;Upon later polishing of the coins, no trace of their having been leached for Ag and Pb extraction was visible. This technique therefore holds potential for analysis of rare exhibit-quality coins in the future.&quot;</i></font>[/QUOTE]</p><p><br /></p>

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