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 Replies: 20 / Views: 13,137 |
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Valued Member
Canada
299 Posts |
Hello, I was going over my collection a few days ago and found a new coin which was never taken out of the plastic with black points or marks ... I do not even know how to call it or what exactly it is :/ Oxidation, toning, patina ... ? Will be very thankful if you could tell me as it is the first new coin I see which such " thing" Thank you :)   P.S. On the right side of the first image, it is the part of the Royal Canadian Mint logo which is seen by reflection. |
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CCF Master Historian of USA Commemoratives
 United States
12274 Posts |
Did you purchase this coin directly from the Royal Canadian Mint or from a dealer on the secondary market? When you look at the coin closely, are the dark areas actually discolored or does it seem like a layer of silver has flaked off? The marks are unusual for such a relatively new coin and I'm wondering if the piece was "messed with" before you came into possession of it. Collecting history one coin or medal at a time! (c) commems. All rights reserved.
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Valued Member
 Canada
299 Posts |
When I looked with a loop closely, it seems as if darkish blue-black ink was put on it. Doesn't seem as if a layer of silver has flaked off. The coin was bough as soon as it came out and was purchased at Canada-Post, which sells lots of Mint coins ... I do not think Canada Post could have possibly done something with the coin.
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Pillar of the Community
Canada
789 Posts |
I have an off-topic question. Would .9999 silver ever rust or oxidate? I know sterling silver would, but not sure about .9999 (pure) silver. Thanks.
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Valued Member
Canada
396 Posts |
The coin doesn't look right. Like what commems said, it looks like a layer is flaking up.
Edited by tocoins
06/20/2012 10:24 pm
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Valued Member
Canada
299 Posts |
I agree. It does seem really weird for a fairly new coin.
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Pillar of the Community
Canada
2366 Posts |
Are these the highest points of the design and if so, are they touching or able to rub against the plastic case?
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Valued Member
Canada
299 Posts |
No, they are not the highest points, and even if they are, they should not be touching the plastic casing. In the first picture, it is definitely not at the highest point.
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Valued Member
Canada
66 Posts |
i actually have a similar problem with one of my coins...i was wondering the same thing.
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Valued Member
Canada
451 Posts |
My guess is that something contaminated it during packing. Dirty hands or contaminated capsule.
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Pillar of the Community
Australia
7096 Posts |
I also have a coin with the same problem   |
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Valued Member
Canada
299 Posts |
Unfortunately no one has a concrete answer  |
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Moderator
Canada
10458 Posts |
Oxidation. To me, it looks like the coins have been stored in a high humidity environment. Over time, all silver coins will eventually spot, or tone, especially coins that contain other minerals, like copper. The only thing you can do is try to keep the humidity down where you store your coins.
"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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Moderator
Australia
16829 Posts |
Quote:
I have an off-topic question. Would .9999 silver ever rust or oxidate? I know sterling silver would, but not sure about .9999 (pure) silver. Thanks. All silver will tarnish, no matter how pure it is. Tarnish is caused by exposure to sulfur, rather than oxygen. Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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Valued Member
Canada
96 Posts |
CP employees sometimes do open the air-tite coin capsule, at least that is what I saw yesterday. God knows whether their hands or gloves have been truly cleaned.
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Valued Member
Canada
451 Posts |
^I never thought of that. Any food residue left on their hands would easily do the trick.
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Replies: 20 / Views: 13,137 |
Posted 06/20/2012 10:16 pm
