Coins Toned

Discussion in 'Coin Chat' started by kovu, Jan 17, 2011.

  1. kovu

    kovu New Member

    Why are some coins appear to be toned in with a rainbow like color, what causes this to happen, is it natural or artificial effect.
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  3. BadThad

    BadThad Calibrated for Lincolns

    Both, the trick is being to tell the difference. Google books: Coin Chemistry
  4. Lehigh96

    Lehigh96 Toning Enthusiast

    Don't take this the wrong way but that response deserves a COME ON MAN. Coin Chemistry is an advanced text on the subject written by a guy whose opinion of toning is tantamount to the lunatic fringe of the numismatic community. I really feel as if a much simpler response is appropriate to the OP's question.

    In a nutshell, rainbow toning is the result of oxidation and a phenomenon called the thin film interface. One of the very best explanations of toning can be found on this very forum written by Jason (physicsfan314). Here is the link:

    What You Need to Know About: The Science of Toning

    BTW, rainbow toning can be both natural or artificial.
  5. rzage

    rzage What Goes Around Comes Around .

    Oxidation causes toning read the link Lehigh gave . It's a touchy subject . W.W. White who wrote Coin Chemistry believes all toning is damage and should be erradicated , guess he just can't appreciate a well toned coin and how rare a rainbow toned coin really is . He'd dip this coin , one of my favorites .
  6. Lehigh96

    Lehigh96 Toning Enthusiast

    If I ever get the opportunity to meet Weimar White, there is only one question I would like to ask him.

    "Excuse Mr. White, I purchased your book Coin Chemistry, CAN I GET A REFUND?"
  7. ronterry

    ronterry New Member

    Anyone get the since the Lehigh96 doesn't like coin/tone doctors? I feel you! In the wrong hands like in the other thread it is used to capitalize on the vanity of toned coins to turn a huge profit. In the right hands it can help detect the work of those (what I call armatures!) destroying coins in the name of profit!

    BTW: The book is nothing more than a collection of articles! So it's not really a book in the sense of having to work at writing it!

    Toning is certainly a subjective topic, and for me it depends on the coin. To answer the original question; Sulfur AND Both.
  8. rzage

    rzage What Goes Around Comes Around .

    I'm with you on that one , plus I don't have a degree in chemistry to understand half of it . LOL
  9. ronterry

    ronterry New Member

    REAL OR FAKE??? We know what does it, now it's all about how?
    Anyone trained can point it out from a mile away, but did you notice how I used a Dansco to add a little legitimacy to the coin? You just have to be careful with tone coins that demand a premium!

  10. GDJMSP

    GDJMSP Numismatist Moderator

    Sometimes, but not always.
  11. ronterry

    ronterry New Member

    True that Kennedy wasn't to obvious - but thats the point :)
    I should start a Real or Fake poll similar to the Grading polls LOL...
  12. kovu

    kovu New Member

    Wow, thanks for all of the replies that you made, thanks for the info, I dont think I will buy any anytime soon. Too expensive and the risk is higher than I want.
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