A Question About Cleaned Copper Coins

Discussion in 'US Coins Forum' started by Milesofwho, Jul 2, 2019.

  1. Milesofwho

    Milesofwho Omnivorous collector

    I am familiar with ways to tell silver cleaning. I feel like I’ve had a decent amount of experience to recognize a cleaned silver coin. However, cleaned copper is where I hesitate. There are obvious ones which I can recognize, but overall I am somewhat unsure. What are some pointers for recognizing copper cleaning?
    Also, is this one cleaned?
    Thanks in advance for your help!
    C2038645-B0C9-4228-ADFC-6EBB3F17C694.jpeg 44E2FE9C-12B9-4E9E-8667-679D69898A9C.jpeg
     
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  3. ldhair

    ldhair Clean Supporter

    The fields are too bright. There should be some toning.
     
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  4. Milesofwho

    Milesofwho Omnivorous collector

    Thank you for the second opinion. I was leaning towards cleaned, and you just helped me confirm that.
     
  5. Mainebill

    Mainebill Bethany Danielle

    I think it’s had an old cleaning and is recovering
     
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  6. Collecting Nut

    Collecting Nut Borderline Hoarder

    Yes it's been cleaned.
     
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  7. TheFinn

    TheFinn Well-Known Member

    Hard to tell with pictures.
     
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  8. Randy Abercrombie

    Randy Abercrombie Supporter! Supporter

    I trust the previous posters. I too have difficulty recognizing cleaned copper. In my mind cleaned copper tends to take on a pinkish hue.
     
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  9. Milesofwho

    Milesofwho Omnivorous collector

    Thanks for the replies! How much do you think this impacts the value? I’d say around 30-50% of the price of normal example.
     
  10. Mainebill

    Mainebill Bethany Danielle

    I think it’s attractive even cleaned other than that one dark spot. it’s almost market acceptable from pics though hard to tell in hand. It wasn’t cleaned recently. As I said it’s recovering nicely and doesn’t have that pink cast anymore that fresh cleaned copper has
     
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  11. Mainebill

    Mainebill Bethany Danielle

    I’d agree
     
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  12. halfcent1793

    halfcent1793 Well-Known Member

    It has active corrosion. Whether or not it has been cleaned is irrelevant given the corrosion. Also, I don't think you can tell from the photos whether or not it's been cleaned, as the color balance might be off.
     
    Last edited: Jul 3, 2019
  13. johnmilton

    johnmilton Well-Known Member

    Except that it's got a big fat corrosion spot on it that is active and growing. Given the "virgin exposure" of metal, there could more corrosion spots in this coin's future.
     
  14. Milesofwho

    Milesofwho Omnivorous collector

    What would be the best thing to do with it?
     
  15. Milesofwho

    Milesofwho Omnivorous collector

    This piece has a similar corrosion spot. Only one other piece (1 Stiver from Essequibo and Demarary) has any corrosion spots.
    27A09B73-80DB-418F-BC03-F22C1B28AA56.jpeg AF1A9C50-5353-45ED-90A2-8E91788BEBDB.jpeg
     
  16. johnmilton

    johnmilton Well-Known Member


    Copper experts, who are better than I, have methods to arrest this stuff. At any rate the coin will never get a straight grade because the damage has been done. This is BIG PROBLEM with cleaning copper. The "restorative process" is often not pretty.

    Years ago, I saw two PCGS certified Proof Indian Cents, in a dealer’s inventory, turn to dust in the holder. The submitter had dipped them to make them red again, and PCGS graded them. The trouble is the coin doctor had not gotten the dip off the coins, and it kept on eating the metal.
     
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  17. TypeCoin971793

    TypeCoin971793 Just a random guy on the internet

    There are certain things that I look for on copper coins to detect a cleaning:

    Pale orange
    Pale purple
    Glossy orange
    Bright, lifeless orange
    Pink
    Black

    Dip some copper cents and see what orange I am talking about. It is easy to discern from original mint red.

    As for the OP coin, I think the lighting is overly incident on the coin, and it is original lustrous RB. The corrosion spot ruins the coin though.
     
  18. JeffC

    JeffC Go explore something and think a happy thought!

    I'm still looking for a 2-cent piece with a legible "WE" (that I can afford) - cleaned or otherwise...
     
  19. Mainebill

    Mainebill Bethany Danielle

    Verdicare and a toothpick being careful will do a lot it’s gotten me a straight grade on some coins I doubted would
     
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