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 Replies: 58 / Views: 13,164 |
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Pillar of the Community
Canada
634 Posts |
We truly have a mystery unfolding here...was this done randomly on select coins...intentionally through the mint....?
Or something completely inexplicable, ghostly connected to the Group of Seven?
It's best everybody check their collection and report their findings...
The most disliked coin of the series may now be the most extraordinary - NCLT ever!!
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Pillar of the Community
 United States
2408 Posts |
SPP, I usually take pictures of my coins and unfortunately my computer crapped out a few years ago and I lost some of them (good thing I uploaded the good ones to CCF!!). I cared most about recovering family pictures but I might still have backups to sort through. I will scan through those during the weekend. All I can tell is that I would have noticed something that obvious upon receiving from the RCM. So I'm 99.99% certain it was silver when I got it. I did not send the coin for plating. All 7 coins were kept in the same conditions. What gives? |
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Pillar of the Community
United States
2408 Posts |
This is what I found in my pictures! Sorry for the poor quality but all coins look silver. That's the only set I purchased so there is no doubt about the source.  So my theory about the capsule is the only plausible explanation for the golden finish. WTH? Why this particular capsule? Unlike soft plastic, hard plastic isn't supposed to have any chemical effect on coins. Every time I look at the coin I see an unbelievably perfect golden finish and I'm afraid that it would fade away... So I will not open the capsule just yet...  |
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Pillar of the Community
Canada
5324 Posts |
You should send the photos and ask the RCM about this, interesting if the RCM answers |
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Pillar of the Community
United States
2408 Posts |
@john Now that I have the original set image showing silver color the RCM will claim "post mint damage" which is, in a way, actually true. This is a mystery. |
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Moderator
 Canada
10458 Posts |
Reminds of the even gold toning you see on the colourized Transatlantic silver dollar... I had assumed perhaps it was the paint causing the toning.... http://goccf.com/t/268024Is the rim (reeding) also toned? "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
United States
2408 Posts |
SPP, yes this was an interesting thread! In the end the XRF proved that it wasn't gold plated after all. In my case, it is definitely not plated so the only plausible explanation is chemical / oxidation. Yes the rim is also toned.  |
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Pillar of the Community
Canada
5324 Posts |
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Pillar of the Community
Canada
6768 Posts |
Without knowing this part of the science, can propose the theory:
This capsule has a micro crack, or any other flaw letting the air to contact the coin.
And oxidization caused not by ordinary CO2, but by the gases came from mini paintings on the COAs (the painting created specific conditions in the closed case)
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Pillar of the Community
United States
2408 Posts |
@silveroid
Interesting theory. For now I'm enjoying my golden silver coin but it does look weird alongside the group of 6.
I might swap the capsule and see what happens!
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Moderator
Canada
10458 Posts |
Quote:
For now I'm enjoying my golden silver coin but it does look weird alongside the group of 6. So buy another silver Macdonald coin for your set... and put that toned coin in an Airtight holder... it is certainly appealing to have a beautiful, uniform golden tone... "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
United States
2408 Posts |
Quote:
So buy another silver Macdonald coin for your set... and put that toned coin in an Airtight holder... it is certainly appealing to have a beautiful, uniform golden tone...  yes!! |
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Pillar of the Community
United States
2408 Posts |
So I did buy another coin. This one is regular silver color. I'm thinking of sending both to PCGS (with the capsules) for proper analysis.  |
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Moderator
Canada
10458 Posts |
If you do, be sure to include the original photos of the coin when you received it... so they understand the context....
(and check up on your MacDonald coin in a couple of years...)
"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
1461 Posts |
NGC would likely say it's artificial toning. Not sure how PCGS would handle it. The coin you see below was a window display in my store in the original capsule and developed an orange tint including the edge. When sent to NGC it came back "Artificial Toning" which raises a whole new conversation about the definition of artificial toning. The mint's capsules do not protect against UV. Actually the opposite, they seem to accelerate the toning process so who knows what other effects those capsules have in combination of elements. Some nickels in 80's sets turn a similar gold color. I now rotate coins often to prevent this from happening.   |
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Replies: 58 / Views: 13,164 |
First Page
Posted 05/24/2018 12:27 am
