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<p>[QUOTE=&quot;quick dog, post: 116674, member: 4093&quot;]That is kind of what I was thinking.&nbsp; Platinum-group metals are pretty rare.&nbsp; Russia has a significant reserve, but geologically the stuff is rare.&nbsp; Wait until China and India decide to worry about air pollution!&nbsp; Demand for P-G catalysts ought to jump big-time.&nbsp; This coins look very interesting.&nbsp; Pretty also.&nbsp; I wish I had some extra money.</p><p><br /></p><p>In the Sierra Nevada, there is a fair bit of platinum-group metals in black sands associated with gold recovery in alluvium mined for construction aggregate material.&nbsp; It is almost a curiosity.&nbsp; Also, during the gold rush of (circa 1849-1889) California, miners sometimes found gem quality diamonds in their gold sluices around my place.&nbsp; The little town of Diamond Springs was named for the diamonds discovered in the so-called &quot;blue lead&quot; (lead as in leading the blind).&nbsp; It was the base of a large Tertiary (40 mybp) channel in the Sierra Foothills wherte I live.&nbsp; One miner found a thumb-sized gem-quality (di-pyramidal) diamond in his sluice.&nbsp; He apparently set it on the bank until after the shift, then hit it with a hammer because he did not know what it was.&nbsp; Rough diamonds are fairly non-descriptive.</p><p><br /></p><p>I would recognize one if I found it!!![/QUOTE]</p><p><br /></p>

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