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<p>[QUOTE=&quot;medoraman, post: 1401158, member: 26302&quot;]I know you know a lot about gemology and minerology Jim, but I beg to differ to an extent. In &quot;King Midas&#039; Gold, Excavations at Sardis&quot;, in the excavations of Lydian smelters they found evidence of fairly consistently high purities of gold. The electrum coins they made were intentionally mixed to a consistent level by mixing 96-99% gold with silver to get a standard alloy. 96-99% was achievable by ancients, so I don&#039;t think that explains why 90% or similar purity was chosen. Btw most ancient gold was higher than 90% very consistently, further evidence that ancient smelters could achieve well above 90% purity consistently.[/QUOTE]</p><p><br /></p>

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