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 Replies: 13 / Views: 3,055 |
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Pillar of the Community
Canada
2301 Posts |
Tested by our own SPP. 93.4% Ni 6.5% copper. Weight 5.05 gms. Awesome coin. But a real stumper. Very close to a 1987 Barbados 25 cents.   |
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Moderator
 Canada
10463 Posts |
Scanner pics Mike, or did you finally buy a decent camera?
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
 Canada
2301 Posts |
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Pillar of the Community
United States
3345 Posts |
those two percentages dont add up, your .1 short
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Moderator
Canada
10463 Posts |
Quote:
those two percentages dont add up, your .1 short There are a handful of trace elements in the analysis, which are not included, because they are either just that - trade elements that occur at or near detection limit of the instrument. This is not banking, if you look at any analytical results, (XRF, quantitative SEM, laser ablation, wet chemistry, fire assay, neutron activation, etc.) the net total never adds up to an even 100%. Part of that gap would include elements that might occur, but in amounts below detection limits and interference from the XRF itself (Iridium beam source, Titanium-lined chamber, etc.). "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
Edited by SPP-Ottawa
02/08/2014 2:20 pm
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Pillar of the Community
Canada
2301 Posts |
yeah......what he said...................LOLOL
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Pillar of the Community
Canada
5324 Posts |
Off metal planchets like this coin are some of the coolest error, nice coin
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Bedrock of the Community
Canada
10743 Posts |
Quote:
Very close to a 1987 Barbados 25 cents. Enlighten me... what does that mean, how can one tell if it's close to a Barbados coin?..  |
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Pillar of the Community
Canada
2301 Posts |
weight is close,but not exact and cupro nickel.
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Valued Member
Canada
334 Posts |
By the weight and look of this coin I don't believe it to be on a foreign planchet . I think it is a regular quarter planchet with a copper wash . just my opinion .
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Pillar of the Community
Canada
2301 Posts |
I considered that it could be a copper wash but the XRF results eliminated that thought.
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Pillar of the Community
Canada
693 Posts |
If it was copper wash, the coin would be magnetic...
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Moderator
Canada
10463 Posts |
A scratch test on the rim (don't worry Mikey, it was small and then examined under the SEM) also confirmed that it was not a copper wash.
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
Canada
2301 Posts |
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Replies: 13 / Views: 3,055 |
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Posted 02/08/2014 11:34 am
