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<p>[QUOTE=&quot;IdesOfMarch01, post: 2759345, member: 39084&quot;]From a purely chemical standpoint, it is not possible for skin oils to react with pure gold.&nbsp; Period.</p><p><br /></p><p>Gold is inert, and only very, very strong acids (e.g., a mixture of nitric and hydrochloric acid) or high-energy reactions can turn metallic gold into ionic gold, which is necessary for another substance to &quot;react&quot; with gold.</p><p><br /></p><p>Silver is different, and readily reacts to sulfides in air (H2S) and small amounts of sulfur or acids that may be present on human skin.</p><p><br /></p><p>If you handled a gold coin that changed its appearance after you handled it, either your hands were dirty or the gold wasn&#039;t pure and other metals in the gold alloy were reacting to your touch.[/QUOTE]</p><p><br /></p>

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