stain/verdigris on tpg'd coin?

Discussion in 'Coin Chat' started by Lugia, May 4, 2010.

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  1. Lugia

    Lugia ye olde UScoin enthusiast

    i was looking at the berk website to see if they got anything new from the show. i noticed this NGC/CAC MS65BN cent. ive seen alot in this grade and none of them looked like this. am i just seeing things or might these spots get worse?
    [​IMG]
    these pics are from their website. http://www.harlanjberk.com/
     
    Lugia, May 4, 2010
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  3. Mad.Outcast

    Mad.Outcast New Member

    if it is green & "active" it may spread in time."spot reviews" from companies,may remove them.
     
    Mad.Outcast, May 4, 2010
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  4. cerdsalicious

    cerdsalicious BigShot

    It could expand, I've rarely seen them slab verdigris though. And by rarely I mean this is the first time.
     
    cerdsalicious, May 4, 2010
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  5. GDJMSP

    GDJMSP Numismatist Moderator

    The spots on that coin are minimal, but they are there. And no, it is not unusual at all. There are countless coins in slabs with verdigris on them, epsecially the older copper. The TPGs do not look at verdigris the same way they look at PVC. They slab routinely slab coins with verdigris.

    But it should also be noted that sometimes the coin is dipped in various solvents in an effort to remove the verdigris before it is submitted for grading. Most, but not all of the verdigris comes off. But later, especially if the coins are not stored properly, the verdigris returns to the coin, grows if you will, after the coin has already been slabbed.
     
    GDJMSP, May 4, 2010
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  6. spock1k

    spock1k King of Hearts

    isnt ti wrong to slab coins with verdi on them. the darn thing has cancer and they still certify it?
     
    spock1k, May 4, 2010
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  7. GDJMSP

    GDJMSP Numismatist Moderator

    I don't make the rules, I just observe.
     
    GDJMSP, May 4, 2010
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  8. Mad.Outcast

    Mad.Outcast New Member

    Somewhere along the line,someone will remove it in the proper way.unfortunately there may be a chance someone ruins it by trying to remove it the wrong way.
     
    Mad.Outcast, May 4, 2010
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  9. Just Carl

    Just Carl Numismatist

    Why would it be wrong? Those TPGS's can do what they want as long as someone pays, they can slab even a pile of dirt. NO real laws about what or what not to slab.
     
    Just Carl, May 4, 2010
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  10. spock1k

    spock1k King of Hearts

    lol :D
     
    spock1k, May 4, 2010
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  11. spock1k

    spock1k King of Hearts

    dear uncle GD

    morally is it right to slab something that will eat the coin with time?

    what is your personal opinion in this matter?


    i hope the question is clearer now :D
     
    spock1k, May 4, 2010
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  12. GDJMSP

    GDJMSP Numismatist Moderator

    Personally, no I do not think that coins with active verdigris on them should be slabbed. That is how they (the TPGs) treat coins with any other environmental contamination and it should be how they treat those with verdigris as well.

    But as with many things regarding US coins of a certain age or rarity, they make different rules and are much more lenient than they are with other coins.
     
    GDJMSP, May 4, 2010
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  13. spock1k

    spock1k King of Hearts

    ok now tell me about verdigris is there a passive one? all verdi is active right?
     
    spock1k, May 4, 2010
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  14. Mad.Outcast

    Mad.Outcast New Member

    That would be like asking,name every color spectrum in the rainbow:D
     
    Mad.Outcast, May 4, 2010
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  15. GDJMSP

    GDJMSP Numismatist Moderator

    Thad is the person you want to talk to, he knows more about verdigris than anybody on the planet that I know of. According to him, verdigris is inactive in the abscence of moisture.

    But therin lies the problem. Slabs are not airtight and there is moisture in the air.
     
    GDJMSP, May 4, 2010
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  16. Leadfoot

    Leadfoot there is no spoon

    You don't need validation from me, but IMO the above is 100% correct.
     
    Leadfoot, May 4, 2010
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  17. Lugia

    Lugia ye olde UScoin enthusiast

    i can see giving it an unc details grade w/environmental damage but not an actual grade.
     
    Lugia, May 4, 2010
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  18. spock1k

    spock1k King of Hearts

    exactly :D

    i have spoken to all the curators in the museum mile and NYC they all say the same thing ;)
     
    spock1k, May 5, 2010
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  19. spock1k

    spock1k King of Hearts

    sigh
     
    spock1k, May 5, 2010
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  20. Mad.Outcast

    Mad.Outcast New Member

    Double sigh:rolleyes:
     
    Mad.Outcast, May 5, 2010
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  21. BadThad

    BadThad Calibrated for Lincolns

    Thanks Doug

    In the absence of feed materials, namely water and air, verdigris cannot continue to form. When properly dried with a desiccating solvent such as acetone and protected from air, verdigris may be considered "inactive".
     
    BadThad, May 5, 2010
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