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<p>[QUOTE=&quot;Tinpot, post: 2066325, member: 35836&quot;]Gold zinc and copper can also be a byproduct of silver. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /> The way they determine which is the byproduct and which is the primary is whichever has a higher dollar value coming out of the ground.</p><p><br /></p><p>So for example if silver shot up to a $100 an ounce some of those copper and gold mines would now be called silver mines.[/QUOTE]</p><p><br /></p>

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