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 Replies: 58 / Views: 12,307 |
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Pillar of the Community
Canada
5294 Posts |
PCGS would probably grade it genuine which just destroy a coin"s value, just chuck it on ebay with a link to this thread, seems like your storage environment is perfect to create this toning |
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Pillar of the Community
 United States
2408 Posts |
Quick update... I'm still debating if I should have this coin certified. One of the last coins I have in my collection...   |
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Pillar of the Community
Canada
1360 Posts |
I submitted this picture to my Mint Rep to get the mint's response to the apparent Alchemist ability of my sealed closet. My coins were all sealed in zip lock bags on a shelf in a cupboard that was rarely opened for 10 or 12 years. In the dark. I laid them out for a random picture. All coins are 'Fine' silver.  Here is the reply from my rep: Quote:"'The effect of ageing is a natural occurrence that is inherent in the coining business in that over time effects such as tarnish, toning or discolouration will appear. These effects are inevitable but normally slow due to process enhancements that we have developed at the Royal Canadian Mint''. Now, over time we have worked with and changed lacquer supplier as some of the older finished coins were not as UV resistant. Keep in mind this can still affect coins stored in the dark away from oxygen and lighting that could speed up the process. We have attempted to rework some coins in the past for customers, however, the outcome in most cases was not a successful one because the process of stripping, polishing and re-lacquering runs the chance of destroying the coin which cannot be replaced for the customer. |
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Pillar of the Community
710 Posts |
Interesting that the mint reworked some coins. I did not know they did this, so interesting information.
Thanks for posting. Cheers!
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Pillar of the Community
United States
2408 Posts |
Quote:
Now, over time we have worked with and changed lacquer supplier as some of the older finished coins were not as UV resistant.  Lacquer!! Interesting side effect. I spotted the use of lacquer 15+ years ago.  Read Commems post on lacquer here: http://goccf.com/t/378362
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Pillar of the Community
Canada
1360 Posts |
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Pillar of the Community
United States
2408 Posts |
I saw this coin on ebay and immediately hit the buy now button thinking this was perhaps another occurrence of my golden coin in the same series. These are the images taken from the ebay listing:   I did not fault the seller, but the image did look more golden on the listing. My bad for not asking for more pictures. Here are both coins side by side...  Mine is convincingly golden. To this day I still do not understand what happened to my coin.  Here is a scan:  Edited by canadian_coins
07/02/2022 8:52 pm
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CCF Master Historian of USA Commemoratives
 United States
11359 Posts |
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The pictures provided are opposite sides of the SAME coin. 2 coins of the entire set exhibited exactly the same - gold one side, silver the other. The remainder of the coins were all normal 'silver' colour. Meant to respond to this one weeks ago... Note the thick "cap" applied to the surface of the reverse side (and only the reverse side) as part of its packaging for Petro Canada. It is this material that is causing the golden colour you are seeing - it's the cap more than the coin that is changing colour.
Collecting history one coin or medal at a time! (c) commems. All rights reserved.
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Bedrock of the Community
Australia
21645 Posts |
What of a theory that the golden tone in this case, could be an off metal strike proof error in aluminum bronze?
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CCF Master Historian of USA Commemoratives
United States
11359 Posts |
Quote:
What of a theory that the golden tone in this case, could be an off metal strike proof error in aluminum bronze? Disproven years back. It's a silver coin with toning.
Collecting history one coin or medal at a time! (c) commems. All rights reserved.
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Pillar of the Community
United States
2408 Posts |
Quick update: Perhaps it's only my imagination but my coin keeps getting "darker" or, I should say, more red copper-like colored.  Unsolved mystery. |
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CCF Master Historian of USA Commemoratives
United States
11359 Posts |
Thanks for the update! Quote:
Perhaps it's only my imagination but my coin keeps getting "darker" or, I should say, more red copper-like colored. Hard to say from comparison images as unless they are guaranteed to have been created under the exact same conditions, colour differences could be lighting-dependent. Collecting history one coin or medal at a time! (c) commems. All rights reserved.
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Pillar of the Community
United States
2408 Posts |
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colour differences could be lighting-dependent Definitely agree with you on that point. I showed the coin to my wife and kids for second opinions... and they all agree that it is closer to copper now, rather than gold. All subjective opinions. But it kind of makes sense that if this is a gradual and on-going toning effect then it could continue to accentuate over time. Then... what the heck is going on? It has to be the capsule.
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Replies: 58 / Views: 12,307 |
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Posted 01/21/2021 9:02 pm
