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<p>[QUOTE=&quot;desertgem, post: 2223933, member: 15199&quot;]Most of the radioisotopes of coin metals do not seem to fall in the range of 10 years to 20,000 years, most being much shorter or much longer. If one knew the original composition of the radioisotope mixture of the original ore when minting, it should be within the resolution of today&#039;s instruments to date it, but how do you know what it was then, as that source ( even if known) would continue to decay also. In radiocarbon dating the death of the carbonaceous source sets the beginning point as no more can be accumulated. Check for PhD theses in radiochemistry or associated geology. Let us know what you find.[/QUOTE]</p><p><br /></p>

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