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What the heck is on this coin?
Insider2
Posts: 14,452 ✭✭✭✭✭
40X images of a Morgan dollar. This Microscopic "fuzz" is something "new" to me. It is on the entire coin - Altered Surface.
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Schmutz.
+1 Schmutz
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Retiring at 55, what day is today?
Is it sticky?
At 40x microschmutchamacallit.
Appearance of a very fine talc like substance... applied wet and then dried?
Looks like some kind of surface mold from storage for a long time in a leather purse in a damp environment.
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Could be the crystallized left over if what was ever applied to the coin maybe a mild acid that didn’t get properly rinsed
https://www.pcgs.com/setregistry/quarters/washington-quarters-major-sets/washington-quarters-date-set-circulation-strikes-1932-present/publishedset/209923
https://www.pcgs.com/setregistry/quarters/washington-quarters-major-sets/washington-quarters-date-set-circulation-strikes-1932-present/album/209923
Looks like it was stored in a fish tank and picked up some growth.
Maybe it is a rare "error" that may be worth One Million Dollars!
Could it have been in one of those old holders with a foam cushion that deteriorated over time?
A: The year they spend more on their library than their coin collection.
A numismatist is judged more on the content of their library than the content of their cabinet.
Not sticky. I just don't know and the coin is long gone.
Oxidation beginning to form.
bob
Evaporated Jewelluster
Just another idea: Metal plating "Whiskers".
This is a common problem in the electronics industry when pure tin or zinc plating is used. These thread-like whiskers can grow, and make unintended contacts on the circuit board, causing shorts and power issues. Based on link on this site, (NASA), it's even possible on silver surfaces:
https://nepp.nasa.gov/whisker/background/
Now, I obviously don't know what was done to this coin previous to you seeing it...or what environment it may have sat in (for years).....but did it look like it might have been plated?
The case against this: The photos on the link seem to indicate more localized growths, as opposed to a "fuzzy" entire surface. Of course, our coin wouldn't short circuit! So the same phenomenon COULD result in a fuzzy appearance over a long time period, and in the right environment.
Anyway, that's the first thing that my mind jumped to when I thought of "fuzzy metal"....right or wrong.
Added: Should point out that this issue started to crop up in an area I'm involved with only after suppliers were required to use non-lead solder...for environmental reasons. The replacement was higher in tin, and the whiskers started to appear. No good deed goes un-punished.
The first pic looks like a letter "R". The second looks like a "bird's beak" and the third looks like a letter "N".
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yikes! Looks nasty. lol
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That's funny cause spacers used in die cutting are called furniture.
My guess clean your furniture (the die)
Some kind of hard mold?
Me thinks it's an alien life force from another galaxy far far away. Did a dip in acetone improve the surface? Peace Roy
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Nasty looking under that magnification....I would like to have such a specimen for analysis...and @TommyType...My years in electronics have definitely exposed me to 'whiskering'... I would solve the issue by having the circuit board reflowed....and yes, even with components, they can be sent through hot air leveling...Cheers, RickO
Reminds me of iron shavings, but I'd imagine it is more likely the residue of a prior addition to the coin's surface.
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A lot of what I'm seeing is digital noise. If you can add more light before getting the picture it will help clarify the image a lot.
I'm thinking environmental. Some sort of mold.
Any old typographers amongst us familiar with the term “type lice?”