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<p>[QUOTE=&quot;jay4202472000, post: 1815503, member: 42573&quot;]I think what spock said at the beginning of the post says it all.&nbsp; He said, &quot;Simple 2 part question here.&quot;&nbsp; <b></b></p><p><b>The answer to part 1 is simply that gold tones.</b>&nbsp; If it didn&#039;t there would be no possible way that the Gold Bisons, which are .9999 gold, would turn red.&nbsp; Do you realize how small .0001, or 0.01%, of a coin is.&nbsp; It sure wouldn&#039;t make up a noticeable spot to the naked eye.&nbsp; It would probably take a pretty strong microscope. The $25 Bison weighs 15.552 grams so that would be only 1.5 one thousandths of a gram.&nbsp; That is not even a grain of sand folks.&nbsp; It is also known that 400-700 years ago, gold coins were made of 100% pure gold.&nbsp; That&#039;s 1.0000.&nbsp; There isn&#039;t even the slightest trace of copper or gold.&nbsp; Guess what?&nbsp; They sometimes got red spots.&nbsp; Gold reacts/dissolves with aqueous cyanide solutions in the presence of air.&nbsp; Keep a gold coin in a house full of smokers in the humid south, and you have problems.&nbsp; It also reacts with chlorine, bromine, and iodine.&nbsp; So, it&#039;s just a fact that sometimes gold tones.</p><p><b>The answer to part 2 is that Intercept Shield was designed to protect copper and silver from corrosive atmospheric sulfur trace gases.</b>&nbsp; Gold simply does not react with sulfur.</p><p><br /></p><p>I have to say, this was very interesting spock.&nbsp; I learned a lot about gold I didn&#039;t know.&nbsp; Keep &#039;em comin&#039;![/QUOTE]</p><p><br /></p>

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