On 15/11/2011, at 4:42 AM, jorganos wrote:
> Nope... copper is a lot heavier than sand, so there are fairly easy ways to separate a sand-poor, copper-rich fraction just like farmers separate spelt from grain by simply shaking it. (Ok, another magic not native to the Beast Nomads...)
For example 'panning' for alluvial gold specks was a very common technique in at least the Australian gold rushes, and I presume others as well - essentially swirling sand around in a shallow pan of water to separate out the heavier metal fragments.
Cheers
David
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