Message:

<p>[QUOTE=&quot;Just Carl, post: 117437, member: 4552&quot;]I&#039;m not sure of exactly what a Carbon/Copper composition could or would mean. These two elements do not react, at least under normal conditions. Now there is a small amount of Copper in Gold coins. However the mixture is NORMALLY a very homogenius mixture. Copper and Gold are a mixture, not a compound. Same with Carbon/Copper if for some reason someone added Carbon to the coins original composition which I doubt the government would allow. However, since Gold and Copper are a mixture, there is a slight chance that due to some cooling procedure, a small quantity of copper could rise to the surface of a sheet of material used to produce the coins. If there is some contaminates in the air when and where the coin is slabbed, the reaction of the contaminate and the copper near the surface could begin but if no further Oxigen or other gas material is permitted to enter the slab, the reaction should cease. </p><p>&nbsp;&nbsp; Again, I suggest you seal the slab in a freezer type plastic bag, squeeze out as much air as possible, and monitor the size of the spot(s) on the coin. If any growth of the spot(s) occurs, there was sufficient contaminates in the slab to continue the process. Also, note that almost all chemical reactions require high temperatures indicating that the invironment you place your coins could also have an effect on this spotting. </p><p>As you know where there is extreme cold the molecular movements deminish causing chemical reactions to deminish. </p><p>&nbsp;&nbsp; Again, sorry for the boring chem lesson. </p><p>Oh, one more thing is not only do power stations utilize fossil fuels (coal, gas, oil) but also foundries, steel mills, fatories with large boilers, etc. Also, many large cities treat the waters from sewerage with chlorines and flourines.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in