Micro-Numismatics Quiz #11 ANSWERED
Insider2
Posts: 14,452 ✭✭✭✭✭
Sorry, no prizes 
I am going to be posting micrographs of anything that can be found on coins. Some will be easy and some will not. The correct answer is whatever I say it is 
but feel free to disagree (giving your reason) so all of us can discuss it. Images will be posted in this thread at my discretion - several each week. I will usually post the answers late the next day after the quiz was posted.
In order to make this FUN for beginners. I'll ask the "experts" to PLEASE not guess what any of the images are until the next day. Otherwise, folks like (fill in the blank) will get all of them immediately - That's NO FUN. If no correct answer is given by the next day, the "experts" should PLEASE respond. The answer for each image will usually be posted in the afternoon when I add another image.
The Rules:
1.Anyone can guess. That's because even an incorrect guess can open further discussion as to why it is incorrect.
2.The BEST guess is in two parts:
A. What characteristic the image shows.
B. What did you see in the image that led to your guess.
The Question: What is causing the colorful surface on this coin. This one is hard; but once you learn what it looks like you'll recognize it from a mile away. 
The Image:
Comments
I don't really know, but it looks like oil on the surface of water.
Improper rinsing?
I am assuming the coin was dry when the pic was taken. It appears that a viscous fluid something was applied.
As DNADave stated it does look like oil.
Therefore, a combination oily watery substance was applied mainly to the fields. Looks like a couple drops on the E and N, too.
Looks like someone tried to apply some type of emulsified product to the coin to enhance the appearance or hide some type of distractor.
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Or, this is a close-up pic from Curiosity travelling through a weird river bed on Mars.
Vasoline
I've been told I tolerate fools poorly...that may explain things if I have a problem with you. Current ebay items - Nothing at the moment
I'll go with mineral oil - an oil that won't go rancid.
What the heck is nose grease? LOL going to read/research more about this.
Dried soap
https://www.autismforums.com/media/albums/acrylic-colors-by-rocco.291/
We know heat will cause metals to rainbow as in artificial toning. Looks like vertigree too on the devices, but isn't that usually non-gold?
WAG version 2:
Dipped in something and then excessive heat dried.
What comes to mind is soap + car windshield + sunny day.
Edit: Soapy water
A good clue is in the discussion.
I bought a metal WW2 ammo can full of nuts and bolts once. Under the crap was about $40 in Walking Libs. The bottom of the can was dry as were all the contents. But, they all had this look. I think that "oil" had something to do with it but don't know how. They looked like when you drop a bit of oil in a puddle, weird "oil slick" pattern.
bob
I was going to say PVC, but them after others chimed in I was leaning toward olive oil residue from a soaking.
But now after the ammo can reference, maybe a petroleum-based residue like Vaseline (coin doctoring?) or cosmoline (if stored in a military container).
OK, we see a refraction pattern (rings of color) on the surface similar to an "oil slick." The coin is
"bone dry." That's all I'll write at the moment.
Is the coin in a plastic flip?
Worry is the interest you pay on a debt you may not owe.
"Paper money eventually returns to its intrinsic value---zero."----Voltaire
"Everything you say should be true, but not everything true should be said."----Voltaire
Ah ha! It's Wishbone oil and vinegar salad dressing!
That reminds me, it's time for lunch.
EVOO is the term a food celebrity uses.
No flip. OK, there is something CLEAR on the coin's surface that is no longer wet. It reflects light similarly to what we can occasionally see in a CLEAR, PLASTIC flip. The coin is raw. ...Ta, da...
http://s2.quickmeme.com/img/1c/1cfdb52ab15449e966f4674292f7a3b0e82cb921fbd16a1a12f65f50d97e0881.jpg
https://img.memecdn.com/Dwight_o_146465.jpg
https://www.autismforums.com/media/albums/acrylic-colors-by-rocco.291/
Sounds like lacquer or varnish.
Vacuum sealed in thin plastic
Yes, These are some of the colors you'll see. At one time putting lacquer on a coin to protect it was common. If the interference pattern does not show, you'll usually see a glossy reflection with a clear false surface above the metal.
Here is the edge of the piece:
>
That edge reminds me of what happened when ‘someone’ re-lacquered our cherry-wood kitchen table with the edge over-flow. 🤭
Glad it was not nose grease.👃
Did they leave bubbles on your table too?
Bubbles and overflow. I guess that is the purpose for table clothes.
So the coin is lacquered?
https://www.autismforums.com/media/albums/acrylic-colors-by-rocco.291/
See the post by Insider2 about five posts above yours.