Why do coins turn gray

Rules, How-to, References... and most important, Introduce Yourself

Moderator: Daniel

Post Reply
Message
Author
Andrew1963imp
Coin Collector
Posts: 30
Joined: Thu Apr 25, 2019 12:12 pm

Why do coins turn gray

#1 Unread post by Andrew1963imp » Tue Jan 07, 2020 6:45 pm

What causes a coin to do this it os gray in middle on back have couple coins like this ... ??
Attachments
IMG_20200107_144611.jpg
IMG_20200107_144457.jpg



User avatar
Daniel
Administrator
Administrator
Posts: 13615
Joined: Wed Jan 28, 2009 4:59 pm
Location: Ohio
Has thanked: 72 times
Been thanked: 173 times
Contact:

Re: Why do coins turn gray

#2 Unread post by Daniel » Tue Jan 07, 2020 8:20 pm

It's toning from reacting with it's environment.

User avatar
Paul
Master Die Variety Examiner
Master Die Variety Examiner
Posts: 5688
Joined: Wed May 29, 2013 9:19 pm
Location: Wisconsin
Has thanked: 56 times
Been thanked: 133 times

Re: Why do coins turn gray

#3 Unread post by Paul » Tue Jan 07, 2020 10:03 pm

:agree:
C.O.N.E.C.A. Wi State Rep
Fly-In Club Wi State Rep

Post Reply