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<p>[QUOTE=&quot;-jeffB, post: 1158420, member: 27832&quot;]<a href="http://www.webelements.com/periodicity/abundance_crust/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.webelements.com/periodicity/abundance_crust/" rel="nofollow">http://www.webelements.com/periodicity/abundance_crust/</a></p><p><br /></p><p>According to this reference, Earth&#039;s crust contains 3.1ppb of gold, 37ppb of platinum. Oddly, it&#039;s one of the sources the Wikipedia article quotes.</p><p><br /></p><p>I&#039;ll try to do a bit more digging -- I was surprised, too, at this abundance figure for platinum. It&#039;s way out of line with the other platinum-group metals.[/QUOTE]</p><p><br /></p>

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