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<p>[QUOTE=&quot;Gallienus, post: 8252477, member: 42034&quot;]Babbitt metal appears to be largely tin (Sn) + other metals: maybe lead or copper.&nbsp; If largely tin, that metal is quite light 7.31 g/cc while silver is heavier 10.49 g/cc.&nbsp; Lead is even heavier tho 11.29.&nbsp; But if largely Sn I expect a Babbitt metal specimen to be appreciably lighter.</p><p><br /></p><p>Why I followed this thread is that I just got my 2nd weird late Roman higher grade siliqua.&nbsp; This is a Constantine III (409-411 AD) following up on a superb Jovinus bought 2-3 years ago.&nbsp; I&#039;d love to do an XRF on both pieces.</p><p><br /></p><p>[ATTACH=full]1454204[/ATTACH] </p><p>Constantine III (co-Emperor in Northern? Gaul) silver siliqua 409 - 411 AD</p><p>ex-Gorny &amp; Mosch</p><p><br /></p><p>[ATTACH=full]1454205[/ATTACH] </p><p>Jovinus (another usurper) silver siliqua 411- 413 AD</p><p><br /></p><p>I&#039;m going to have to stop myself from buying these odd ball siliqua and buy some nice regular coinage for a change![/QUOTE]</p><p><br /></p>

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