Need help, What are these spots?

Discussion in 'Coin Chat' started by coryjames79, May 5, 2024.

  1. coryjames79

    coryjames79 New Member

    I've been looking at various modern proof coins, some slabbed and graded and some still in ogp. I know they're not anything crazy special or expensive but are the marks pointed out in the pics actually on the coin or on the case from the ogp velvet? Milk spots? Just so many tiny dots not really sure and was looking for help. Any insight would be appreciated, thank you in advance for the help!
     

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  3. mrweaseluv

    mrweaseluv Supporter! Supporter

    they are called "milk spots" or water spots.. they are general believed to be caused by storing a coin in an enviroment that is too humid..
    very common and a pain in the arse to all collectors of ms70 coins.
     
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  4. coryjames79

    coryjames79 New Member

    Thank you, yes idk how many of the 2008 bald eagle dollars I looked at, a lot, they seemed to all have them. I couldn't find one that didn't. I thought it was unusual. Even appeared on slabbed ones I looked at.
     
  5. Pickin and Grinin

    Pickin and Grinin Well-Known Member

    THats the toning showing first in the areas that the coin has a defect or die deterioration.
    This 86' has milk spots that have toned over.
    upload_2024-5-5_18-33-28.jpeg
     
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  6. Collecting Nut

    Collecting Nut Borderline Hoarder

    Nasty Milk Spots is what they are commonly called.
     
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  7. GDJMSP

    GDJMSP Numismatist Moderator

    A lot of people call them, or refer to them as milk spots but the spots we see in the pics in this thread are not milk spots. Milk spots are caused by something in, as inside, the metal itself. We know this because coin dip will not remove them. For if it were something on the metal, coin dip would remove it. No one knows for sure what it is that is in the metal, but there are a few theories. Nor has anyone ever found a way to safely remove milk spots.

    The spots we see in these pics were caused by something on the metal, not inside the metal.
     
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