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<p>[QUOTE=&quot;medoraman, post: 2222063, member: 26302&quot;]I am very aware how Copper mines are large primary sources of both silver and gold, and how lead-tin mines are large suppliers of silver. I referenced it in my ealier post to Mike about $800 gold costs considering the devaluation of other metals in the mining stream. The lower copper or tin goes, though, has to raise the price of the gold from the mine if proper allocation accounting is used. Conversely, high copper or tin prices would generally be bearish for PM since miners can continue to mine copper at $4 a pound even if gold went to $400 an ounce. Copper at $2 a pound, though, will not work if gold is $400, and the mine would shut down.</p><p>&nbsp;</p><p>Some gold and silver come from primary mines, but much comes as byproducts. Platinum is different. A little come from other mines, but most I believe comes from primary PT/PA mines.[/QUOTE]</p><p><br /></p>

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