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<p>[QUOTE=&quot;GDJMSP, post: 4689281, member: 112&quot;]Yeah, it&#039;s always the alloy that causes color differences. But the thing is, the alloy is not always intentionally what it is, but quite often merely what it happens to be.</p><p><br /></p><p>Ya see, it&#039;s pretty expensive to refine gold down to its purest form, and the higher you want that fineness to be, the more it cost. So what is often done is the gold is refined down to the desired fineness and then refinement stops. And whatever impurities happen to remain - remain. </p><p><br /></p><p>In other words it&#039;s pure chance.[/QUOTE]</p><p><br /></p>

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