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A/T or real toning on gold?

logger7logger7 Posts: 7,761 ✭✭✭✭✭

I've seen toning like this flagged as artificial in the past. What do knowledgeable experts here think?


  • MFeldMFeld Posts: 11,048 ✭✭✭✭✭

    If that’s what the coin actually looks like, I don’t think it’s original.
    But I suspect that’s a big “if”.

    Mark Feld* of Heritage Auctions*Unless otherwise noted, my posts here represent my personal opinions.

  • PerryHallPerryHall Posts: 44,824 ✭✭✭✭✭

    Iodine was used at one time to give gold coins a deep yellow-gold color. I think this type of AT has fallen out of favor among the coin doctors.

    Worry is the interest you pay on a debt you may not owe.

  • jwittenjwitten Posts: 5,059 ✭✭✭✭✭

    I wouldn’t call that toning. Looks more like a putty job or something weird to me.

  • logger7logger7 Posts: 7,761 ✭✭✭✭✭

    Some observations from an old time dealer on the doctoring process, I thought other chemicals like arsenic and mercury may be used by the coin doctors:

    "Having served as technical consultant to the PNG Coin Doctoring Definition committee at the behest of John Albanese, let me address these points.

    1) "orange peel" is not a toning characteristic. Rather it is a stippled surface quality resulting from mint-caused "die suction" during the striking process (second strike) and is not considered an impairment. It only occurs on Liberty Head proofs. I have seen it most often on $3's and $5's. Neither Michael Jordan nor LeBron James but @FredWeinberg is the GOAT on such topics.

    2) Mercury will destroy silver by turning it dull gray. I have never heard of it used to tone gold,

    3) Arsenic removes, not creates toning.

    "While iodine works, virtually nothing else I am aware of chemically combines with the copper in gold without heat or electricity being applied. I can speculate on what might have "happened" to the coin in question, but based no my experience no natural process was involved."

  • clarkbar04clarkbar04 Posts: 4,895 ✭✭✭✭✭

    Knowledgeable amateur here, but to me it looks like a weird camera angle and lighting highlighting the differences between the original untouched protected surfaces around the letters and the wear/rub from circulation on a mid AU coin.

    MS66 taste on an MS63 budget.
  • BryceMBryceM Posts: 11,587 ✭✭✭✭✭

    I'm not so sure iodine reacted with the gold so much as it simply stained the surface. As for this coin, I'm finding it difficult to evaluate the photo. I don't see any toning, really, but as @clarkbar04 says, the relatively protected areas between the devices look a bit unusual. It could be an artifact of the lighting.

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