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 Replies: 17 / Views: 5,236 |
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Valued Member
 United States
355 Posts |
is it the copper or nickle that is causing the blue tone? Or is it something else?
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Moderator
 United States
189325 Posts |
I would suspect it is the nickel, but I do not know for certain. I hope one of our resident chemists will know and I await their response to this topic.
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Pillar of the Community
United States
4132 Posts |
Generally I see it on the ones that are a few years old and lightly circulated but have less circulation wear and and a smoother surface than most of the other nickels that age. For instance, the better condition Westward Journey nickels I find in rolls sometimes have this coloration (or yellow, or a combination of the two). I can kinda use it as an indication of the better ones I should pick out to look at to possibly put in my book.
Also the blue is pretty.
I see it less as they get older, even on the ones in good condition (i.e. I see it rarely on Nickels from the 80s). So I assume it's a relatively transient state.
Edited by CaptainFwiffo
06/30/2011 4:34 pm
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Moderator
Australia
16849 Posts |
Quote:
is it the copper or nickle that is causing the blue tone? Or is it something else? Strange rainbow-like coloration on coins has nothing to do with the composition of the coin, and everything to do with the thickness of the layer of whatever it is that's causing the discolouration. It's the same thin film effect as when you see colours in soap bubbles or oil floating on water. In the case of coins, it's usually a thin film of surface oxidation/corrosion that generates the colours, though it could also be caused by a thin film of actual oil/grease or some other substance. 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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Pillar of the Community
United States
880 Posts |
I don't know, but that's a nice looking quarter in my opinion.
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Pillar of the Community
United States
3592 Posts |
I've got a nice BU quarter with the same toning...just had to stick it in a 2x2  |
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Pillar of the Community
United States
1151 Posts |
Ive seen nickels lke that due to heat.
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Valued Member
Canada
278 Posts |
Eiterh way, it is a very cool looking coin. I have yet to see that on a Canadian coin though...strange.
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Valued Member
United States
355 Posts |
I don't have the time to photograph and upload today but I found a yellowish toned State Quarter as well....its funny how you don't notice this stuff until you start collecting. |
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Pillar of the Community
United States
4132 Posts |
I've gotten the old chrome-plated Canadian nickels - sometimes those are REALLY REALLY blue.
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Pillar of the Community
United States
1151 Posts |
Chrome always seems to do that to a coin.
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Bedrock of the Community
United States
19964 Posts |
Chemical exposure damage IMO. Others may differ with my opinion, but that look would generally be considered "artificial toning".
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Pillar of the Community
United States
4132 Posts |
I can give you rolls of bluish keelboat nickels. It's just common cupronickel toning. Maybe it depends on your climate? I'm in Florida so maybe it's more likely to get those blue and yellow colors.
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Bedrock of the Community
United States
20753 Posts |
For some reason some dish soaps create that effect. I don't mean dipping a coin in dish soaps, but if you've been using some and then handle some coins, many will turn bluish. The thing to remember is toning, AT or NT is created by the outer layer of material of a coin with almost anything in the invironment. Air, moisture, air born contaminates. For example one of the biggest culprits to toning is in areas where Sulfur Rich Coal is burned. Power Stations, steel mills, etc. That Sulfur goes into the air as SO or SO2 and mixes with moisture in the air to form an Acid. As most have heard of Acid Rain and that is what this is. AND if effects coins easily as well as ruining almost anything.
If you have a pool or live near a large pool, note the main thing people put in there is a form of Chlorine. This tends to evaporate into the air and if your coins are near that, that too effects the way they tend to change.
Garbage dumps produce Ammonia Gasses that also effect coins.
And don't forget that Garlic you put on food. Might not effect coins but sure makes for bad breath.
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Pillar of the Community
United States
764 Posts |
I have a silver proof CT quarter single with bluish toning, but I have no clue what caused it.
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Replies: 17 / Views: 5,236 |
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Posted 06/30/2011 4:18 pm
