Message:

<p>[QUOTE=&quot;desertgem, post: 2224091, member: 15199&quot;]Since no effort has yet been made to separate the isotopes of coin metals before minting coin ( consider the problems of just separating&nbsp; Uranium isotopes for nuclear armaments) no one would bother due to the expense. Any physical alteration of the metal does not change the isotopes composition, so a coin would have the same isotope composition as the original mine deposit, however different mine deposits ( copper from Arizona or Africa) could have different trace mineral&nbsp; isotopes. Here is an article about tracing origins of emeralds. This applies to many other stones, and is important when there are legal aspects to import or sell due to political situations. It is an interesting thought, but I think one would be better to study classical dating ( anthropological -geological formations) than hope for this.</p><p><br /></p><p>Now the forum is probably on NSA list for discussing separating Uranium isotopes. North Korea will say they are studying coin dating <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /> Sorry Peter.[/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