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2013 $1 Mor Coin ... Wrong Colour?

 
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Author Previous TopicReplies: 5 / Views: 274Next Topic  
Pillar of the Community

Australia
721 Posts
 Posted 09/27/2020  05:33 am Show Profile   Bookmark this topic Add coaster to your friends list Get a Link to this Message
I found this coin in the reject bin of the bank's coin deposit machine. At first glance I thought it was a 2c coin that had been discarded but was surprised to find that it was actually a $1 coin.
(I've included another coin for comparison)




I've never come across this before ...has anyone else, or does anyone have an idea as to what might have caused this?

Bedrock of the Community
United States
36156 Posts
 Posted 09/27/2020  09:16 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
Plated?
John1
( I'm no pro, it's just my humble opinion )
Searched 5+ Million Cents Since 1971
Valued Member
Australia
290 Posts
 Posted 09/27/2020  09:34 am  Show Profile   Bookmark this reply Add echidna to your friends list Get a Link to this Reply
The protected areas are a different colour.
PMD I'd say.
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Australia
13451 Posts
 Posted 09/27/2020  7:14 pm  Show Profile   Bookmark this reply Add Sap to your friends list Get a Link to this Reply
Environmental damage, would be my guess. Perhaps sitting in a chlorinated swimming pool for a long time? Or maybe ammonia - I've never tried dunking an aluminium-bronze coin in concentrated ammonia to see what colour it changed to, but bronze coins turn orange.

I doubt it's a mint error. It looks circulated; very few people would "circulate" a coin that looked that different to a normal $1.
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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Australia
13451 Posts
 Posted 09/28/2020  11:40 pm  Show Profile   Bookmark this reply Add Sap to your friends list Get a Link to this Reply
Nope, wasn't ammonia. Just did a quick check in the lab and ammonia makes an AlBr coin turn slightly less yellow.
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
Pillar of the Community
Australia
631 Posts
 Posted 09/28/2020  11:48 pm  Show Profile   Bookmark this reply Add Basil to your friends list Get a Link to this Reply

Quote:
Nope, wasn't ammonia. Just did a quick check in the lab and ammonia makes an AlBr coin turn slightly less yellow.


It is most likely enviromental damgage thou.,there is another thread on here somewhere with a similar Coin.
I have seen similar discoloration from Coins sitting under floor mats in a car,bit of moisture and the Patina changes, affected by the carpet or rubber mats.
Edited by Basil
09/29/2020 08:00 am
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