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<p>[QUOTE=&quot;desertgem, post: 1920759, member: 15199&quot;]My concerns on the analysis process with a touch stone and/or karat needles required : 1. very strong mineral acids which do not appear in the western world until the alchemists in medieval times ( although again, I am not sure of discovery and use by other areas of the world before then).&nbsp; and</p><p><br /></p><p>2. Most of the XRF analysis of ancient artifacts seem to indicate that the gold and/or silver content was almost identical to the alluvial gold available. In other words, no refining was done to increase the purity ,so some 90+ percent , some in low 80%. although the 2nd paper below indicates they believe that some refining in other culture took place, but only to decrease the gold content from alluvial to less than 50%, a&nbsp; &quot;gold gilding&quot; process. XRF non-destructively can only determine surface content.</p><p><br /></p><p><a href="http://www.acad.ro/sectii2002/proceedings/doc2012-1/03-Constantinescu.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.acad.ro/sectii2002/proceedings/doc2012-1/03-Constantinescu.pdf" rel="nofollow">http://www.acad.ro/sectii2002/proceedings/doc2012-1/03-Constantinescu.pdf</a></p><p><br /></p><p><a href="http://hbar.phys.msu.su/gorm/dating/gold.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://hbar.phys.msu.su/gorm/dating/gold.pdf" rel="nofollow">http://hbar.phys.msu.su/gorm/dating/gold.pdf</a></p><p><br /></p><p>And I have exhausted my interest in this area. I won&#039;t be buying proto lumps&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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