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<p>[QUOTE=&quot;Parthicus, post: 2670121, member: 81887&quot;][USER=85830]@arashpour[/USER]: Good question on the weight.&nbsp; A major problem with using weight of Arab-Sasanian coins to determine authenticity is that many (but not all) of them have been clipped, sometimes to bring them down to the weight of a post-reform dirham, sometimes just to steal a bit of extra silver.&nbsp;&nbsp; I looked up coins of Ziyad b. Abi Sufyan online, and here are the weights of the first 16 coins I found:</p><p>2.7, 2.97, 2.54, 4.0, 3.77, 3.13, 4.15, 2.26, 3.94, 2.89, 3.07, 3.06, 4.11, 3.88, 2.76, 3.30.&nbsp; &nbsp; From this, we get an average weight (mean +/- SD) of 3.28 +/- 0.61g.&nbsp; Of course, the exact figure will change a bit if we add more coins to our sample size, but your piece is well within what we could reasonably expect (allowing for clipping, minor variation in initial weight, and changes due to preservation- crystallization of silver into &quot;horn silver&quot; can cause greatly decreased weight.)</p><p><br /></p><p>If you are still worried about authenticity, you should probably have an expert examine the coin in person.&nbsp; (I am just an amateur in this series, and there are limits to what anyone can tell from photos.)&nbsp; I know that Stephen Album used to offer a low-cost attribution/authenticity opinion if you mailed a coin to him (with advance notice), not sure if he still does but you can check his website to find out.[/QUOTE]</p><p><br /></p>

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