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<p>[QUOTE=&quot;-jeffB, post: 1858484, member: 27832&quot;]That&#039;s right. Confusing, isn&#039;t it? The explanation I&#039;ve heard is that 90% has a predictable, known composition, with the other 10% pretty much pure copper; this makes it easy to refine in bulk. In sterling, the other 7.5% can include a number of different elements, and the composition can vary from piece to piece, making the silver harder to reclaim.</p><p><br /></p><p>No such issue with low-purity gold, though; gold&#039;s easy to separate from just about anything you&#039;re likely to find in 10K/14K alloys.[/QUOTE]</p><p><br /></p>

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