Coin Community Family of Web Sites
Like us on Facebook! Subscribe to our Youtube Channel! Check out our Twitter! Check out our Pinterest!
Username:
Password:
Save Password
Forgot your Password?

Welcome Guest! Need help? Got a question? Inherit some coins?
Our coin forum is completely free! Register Now!

A "Copper" Nickel Dollar Mystery... 1982 Constitution

 
 
To participate in the forum you must log in or register.
Author Previous Topic Topic Next Topic  
Moderator
Learn More...
Canada
8350 Posts
 Posted 03/15/2019  8:52 pm Show Profile   Check SPP-Ottawa's eBay Listings Bookmark this topic Add SPP-Ottawa to your friends list Get a Link to this Message
This little mystery came out of a paper-wrapped mint roll, and it has me scratching my head. This is not struck through bronze/copper fragments, this is not plated, and it does not come off with acetone or toluene... The reverse is spectacular, as portions of it shine like a newly struck bronze cent...

I have no idea what I am seeing here... almost looks like a copper wash (The theory is that in the rinse bath, copper ions are preferentially liberated from previously washed 1c planchets, and then re-deposited on new batches of other coins when the solution becomes saturated)

Or, a sintered coin (Sintering is caused by the small dust-sized copper or other metal that are removed from the planchets or the drum they spin in, it then sticks to the planchet and then is annealed to soften the planchet before striking. The annealing step bakes the sintering on).

Anyone here able to provide some insight, and why both sides have much different degrees of "copper" finish?


"Research is what I am doing, when I don't know what I am doing" --Wernher von Braun

Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US

My eBay store
Pillar of the Community
Canada
2349 Posts
 Posted 03/15/2019  8:55 pm  Show Profile   Bookmark this reply Add oriole to your friends list Get a Link to this Reply
@SPP, if I saw this I would be asking you!
Moderator
Learn More...
Canada
8350 Posts
 Posted 03/15/2019  9:13 pm  Show Profile   Check SPP-Ottawa's eBay Listings Bookmark this reply Add SPP-Ottawa to your friends list Get a Link to this Reply
Another photo, with a different light intensity and incident angle.

"Research is what I am doing, when I don't know what I am doing" --Wernher von Braun

Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US

My eBay store
Moderator
Learn More...
Canada
8350 Posts
 Posted 03/15/2019  9:15 pm  Show Profile   Check SPP-Ottawa's eBay Listings Bookmark this reply Add SPP-Ottawa to your friends list Get a Link to this Reply

Quote:
@SPP, if I saw this I would be asking you!


Yeah, I know... I am posting this in Mike Diamond's error forum, where some heavy error hitters frequent (e.g., Jon Sullivan, Fred Weinberg, etc...).

I have seen tens of thousands of nickel dollars and 50c coins, and never have seen this before...
"Research is what I am doing, when I don't know what I am doing" --Wernher von Braun

Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US

My eBay store
Pillar of the Community
Canada
2349 Posts
 Posted 03/16/2019  06:40 am  Show Profile   Bookmark this reply Add oriole to your friends list Get a Link to this Reply
What were the results of your XRF test?
  Previous Topic Topic Next Topic  
 
To participate in the forum you must log in or register.

Coin Community Member eBay Sales

Certified Coins   Certified VAMs   Certified Errors  




Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Coin Community assumes no liability for errors. Copyright 2005 - 2019 Coin Community Family- all rights reserved worldwide. Use of any images or content on this website without prior written permission of Coin Community or the original lender is strictly prohibited.
Contact Us  |  Advertise Here  |  Privacy Policy / Terms of Use

Coin Community Forum © 2005 - 2019 Coin Community Forums
It took 0.66 seconds to rattle this change. Powered By: Snitz Forums 2000 Version 3.4.05