What's going on with this Lincoln proof?

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  • TurboSnail
    TurboSnail Posts: 1,669 ✭✭✭✭✭
    edited April 26, 2018 6:41AM
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    Btw. I have same gut feeling as Ricko and Insider2 that OP's penny was result of metal eating fungus.

    It somehow reminds me of this discovery from more than a decade ago.
    https://www.telegraph.co.uk/news/worldnews/centralamericaandthecaribbean/belize/1312221/Scientist-finds-fungus-that-eats-through-compact-discs.html

    And some other infor found off net.

    "Fungi can grow almost on a surface of all materials. Biomolecules of fungi membranes allow them to attach on any surfaces and form a biofilm. Fungicidal additives in plastics of antifungal properties of some metals (copper, silver) initiate killing the fungi adsorbed, however 2-nd, 3-rd or i-th layer of fungi start to grow. Living fuctions of fungi cover via substantial quantities of organics in an air."

    Alexander Tolstov
    National Academy of Sciences of Ukraine

  • toyz4geo
    toyz4geo Posts: 1,506 ✭✭✭✭✭
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    Definitely odd, whatever it is, was, or gonna be.

    Successful transactions with: JimTyler, Morgan13, ChangeInHistory, LukeMarshall, Old_Collector, basets , MICHAELDIXON, Waverlycoins, dsessom, privatecoin, SurfinxHI, ZoidMeister, giorgioll, Lakesammman, Twobitcollector, Cazkaboom, Dscoin, Shrub68, CoinHunter4, Cladiator, coinbuf, Elkevvo, ChrisH82, WindyCity, Kccoin, NumisOxide, Meltdown, blaircountycoin, blue62vette, greencopper, Kliao, Downtown1974, BankerBob56, coinlieutenant, cucamongacoin, FranklinFactory, scooter25, erwindoc, bigjpst, and others.

  • Insider2
    Insider2 Posts: 14,452 ✭✭✭✭✭
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    This pattern of "scum" covers the entire surface of a clad proof 50c. Makes the coin look matte and pretty in its own way. :)

  • sparky64
    sparky64 Posts: 7,065 ✭✭✭✭✭
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    Those are some amazing pics @Insider2 !

    "If I say something in the woods and my wife isn't there to hear it.....am I still wrong?"

    My Washington Quarter Registry set...in progress

  • JBK
    JBK Posts: 17,877 ✭✭✭✭✭
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    We need to nail down what this stuff is. I am getting creeped out.

    It is bad enough that I have to worry about bugs and dust mites eating my paper collectibles, but now I have to worry about my coins as well.

  • Insider2
    Insider2 Posts: 14,452 ✭✭✭✭✭
    edited May 1, 2018 12:24PM
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    Microscope camera + florescent light. Unfortunately I cannot take an entire image of a quarter! Off the scope, the camera is not good enough (the operator?) to take a sharp image of a coin.

    The film comes off. I'm beginning to suspect it may be an organic haze rather than a chemical residue crystallization. I cannot remember seeing this stuff on silver which impedes the growth of stuff.

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