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<p>[QUOTE=&quot;Curtis, post: 24630979, member: 26430&quot;]Beautiful! This raises the very interesting topic of &quot;Riverine&quot; surface (occasionally called &quot;Tiber patina,&quot; but I can&#039;t believe <i>that</i> many are actually still found in the Tiber).</p><p><br /></p><p>It&#039;s hard to tell from those photos, but this is exactly what they look like when they&#039;ve been found in water. [USER=85693]@Marsyas Mike[/USER] , I would suspect your &quot;overcleaned&quot; Domitian &amp; Trajan of being ones too.</p><p><br /></p><p>Here are some from a recently discovered group of large AEs thrown in a spring in Italy as votive offerings (NOT mine!!):</p><p><br /></p><p>[ATTACH=full]1566820[/ATTACH]</p><p>Source: <a href="https://www.thearchaeologist.org/blog/treasure-trove-of-perfect-votive-offerings-found-at-etruscan-thermal-baths" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.thearchaeologist.org/blog/treasure-trove-of-perfect-votive-offerings-found-at-etruscan-thermal-baths" rel="nofollow">https://www.thearchaeologist.org/blog/treasure-trove-of-perfect-votive-offerings-found-at-etruscan-thermal-baths</a></p><p><br /></p><p>You can also search ACSearch for &quot;<a href="https://www.acsearch.info/search.html?term=riverine&amp;category=1&amp;order=1" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.acsearch.info/search.html?term=riverine&amp;category=1&amp;order=1" rel="nofollow">riverine</a>&quot; and &quot;<a href="https://www.acsearch.info/search.html?term=%22tiber+patina%22&amp;order=1" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.acsearch.info/search.html?term=%22tiber+patina%22&amp;order=1" rel="nofollow">tiber patina</a>,&quot; but I&#039;m sure it&#039;s tempting for a dealer to apply those terms to an overcleaned sestertius, and I&#039;m not sure how to distinguish in every case.</p><p><br /></p><p>Here&#039;s a Domitian of mine that I <i><b>do suspect was cleaned</b></i> (a very long time ago) due to the porosity, which I think should probably be absent on a river patina:</p><p><br /></p><p>[ATTACH=full]1566815[/ATTACH]</p><p><br /></p><p>That said, these are some of the only &quot;bronze&quot; coins that I think can look pretty good -- even better -- <i><b>without</b></i> a classic thick clamshell patina.</p><p><br /></p><p>Depending on conditions, I suspect &quot;riverine&quot; brass/coppers can be a bit etched, crystallized. This Hadrian was &quot;yellower&quot; when I bought it &gt;35 years ago, I always wondered if it was actually a &quot;Tiber&quot; (I think I bought it in Italy, c. 1980s). Then about 15 years ago I moved to a humid area and it caught B.D. (obverse 9h), and the fields darkened after I treated it (I finish w/ oxidized colloidal silver mixed with Ren Wax, untraditional, but I&#039;ve had success):[ATTACH=full]1566814[/ATTACH]</p><p><br /></p><p><br /></p><p>For one that definitely was NOT from the Tiber or a hot spring, here&#039;s my favorite green clamshell patina (or see dealer <a href="https://www.acsearch.info/search.html?id=235177" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.acsearch.info/search.html?id=235177" rel="nofollow">photo one</a> or <a href="https://www.acsearch.info/search.html?id=9492718" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.acsearch.info/search.html?id=9492718" rel="nofollow">photo two</a>):</p><p><br /></p><p>[ATTACH=full]1566816[/ATTACH][/QUOTE]</p><p><br /></p>

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