I'll try to get a pic tomorrow of an example. What would cause a coin to have a different tone that is striped across the face. I'm not talking about rainbow hues, just a different color? Possible causes?
An improper alloy mix would do it, depending on the denomination and date. Or environmental damage. Really hard to speculate without more to go on…imo…Spark
Here she is. Obverse and reverse don't have the same lamination stripe. Mind you, these have been sitting in a vault no less that 40-50 years ago. I have zero clue.
Looks more where a piece of tape or something was wrapped around while most of the coin toned, and was then removed.
@Barney McRae it looks like the coin was exposed to something in the environment, but also protected by, well, something. An extreme example of that would be putting a rubber band on a silver coin and tossing it on the window ledge for a couple of months. The sulfur in the cheap rubber band would react with the silver and tone/tarnish it almost black, while the rest of the surface would be a more normal color.
To me it appears that a piece of tape covered the lighter areas long enough that the rest of the coin toned.
I disagree. The coin has tape residue (golden color) on its obverse. That allowed the bi-color you see to develop. The results from putting tape or a rubber band on a silver coin are very different in every way. Putting a rubber band on a silver coin in the sun will eventually corrode its surface. The reverse has a bright streak where the toned surface was buffed.
I never said it was colored BECAUSE of a rubber band, I was using it - AS I SAID - as an extreme example of how how something on the surface could cause different colors. Geesh. Try reading for comprehension. Seems to be a common problem for you.
SORRY! You could have saved your post and my need to reply. I guess I gave you more credit than you deserved. You see, I figured you and other members were educated enough to comprehend (a common problem here) that you were bringing up something entirely different AND NOT ON THE COIN in order to add to the discussion. Perhaps I needed to add that fact to my post for our foreign speaking members. Nevertheless, I did attempt to make sure less informed members than yourself would not think residues and corrosion were the same. Additionally, as you know, tape residue is not considered environmental damage. Oh, I better add that you did not say that either. PS Chill out. We both have better things to do in life.
The toning and residue or the least of your issues; those can be resolved fairly easily. The real issue are the carved letters in front of her nose/forehead.
