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<p>[QUOTE=&quot;red_spork, post: 2981279, member: 74282&quot;]&quot;The H Denarius&quot; by Richard Witschonke in Numismatic Chronicle 2008 actually mentions a coin being tested by neutron activation analysis. <a href="http://gallica.bnf.fr/ark:/12148/btv1b104237237" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://gallica.bnf.fr/ark:/12148/btv1b104237237" rel="nofollow">The denarius in question</a> was in the BNF in Paris and with a weight of 3.17g was far below the theoretical weight of an official coin of circa 4.2g. Crawford in Roman Republican Coinage had rejected this example, apparently assuming it to be an ancient plated forgery, and with it this denarius variety altogether but neutron activation analysis revealed a purity of approximately 97% silver, proving once and for all that it wasn&#039;t plated. Additionally, a specific gravity test showed that another example from the same dies was almost certainly solid silver.[/QUOTE]</p><p><br /></p>

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