Any pictures of old gold that have been AT'd with IODINE?

Prethen · February 20, 2011 7:04AM

I've heard that gold coins like $3 gold have been AT'd with Iodine. What does this look like? Are any market acceptable?

Prethen · February 21, 2011 2:05AM

AnkurJ · February 21, 2011 2:07AM

I'm not familiar with it, but would be interested to see any examples as well.

PCcoins · February 21, 2011 2:17AM

Well Iodine is a orangish-red color so I guess it could be used to turn gold to a desirable orangish color? I've never heard of it being used before.

coinguy1 · February 21, 2011 2:22AM

<< Well Iodine is a orangish-red color so I guess it could be used to turn gold to a desirable orangish color? I've never heard of it being used before. >>

That is correct about the color and it has been done on numerous occasions.

RYK · February 21, 2011 2:36AM

Yes, I have a coin that I have been told has been iodined in the past. I will post a photo later, when I get home. I did not iodine it, do not know who iodined it, do not even know 100% for sure that it was iodined, but someone who is universally respected for knowing how to detect these things told me that it was and refused to "approve" it.

Anyway, later...

AnkurJ · February 21, 2011 2:38AM

<< Yes, I have a coin that I have been told has been iodined in the past. I will post a photo later, when I get home. I did not iodine it, do not know who iodined it, do not even know 100% for sure that it was iodined, but someone who is universally respected for knowing how to detect these things told me that it was and refused to "approve" it.

Anyway, later... >>

JA?

RYK · February 21, 2011 2:40AM

<< 

<< Yes, I have a coin that I have been told has been iodined in the past. I will post a photo later, when I get home. I did not iodine it, do not know who iodined it, do not even know 100% for sure that it was iodined, but someone who is universally respected for knowing how to detect these things told me that it was and refused to "approve" it.

Anyway, later... >>

JA? >>

Gosh, I did not know that we have a Mensa member among us on the forum.

AnkurJ · February 21, 2011 2:43AM

I try I try

Bah1513 · February 21, 2011 2:50AM

would like to pics also

RYK · February 21, 2011 11:58AM

I have been told that this coin may have been previously iodined (see disclaimer posted previously):

llafoe · February 21, 2011 12:02PM

<< 

<< 

<< Yes, I have a coin that I have been told has been iodined in the past. I will post a photo later, when I get home. I did not iodine it, do not know who iodined it, do not even know 100% for sure that it was iodined, but someone who is universally respected for knowing how to detect these things told me that it was and refused to "approve" it.

Anyway, later... >>

JA? >>

Gosh, I did not know that we have a Mensa member among us on the forum.

>>

Less likely Mensa and more likely The Amazing Kreskin.

keets · February 21, 2011 12:05PM

GRRRRRRRRRRRRREAT, something else to watch for.

RYK · February 21, 2011 12:08PM

<< GRRRRRRRRRRRRREAT, something else to watch for.

>>

You have not been looking for iodine!

coinguy1 · February 21, 2011 12:09PM

<< I have been told that this coin may have been previously iodined (see disclaimer posted previously):

>>

Did I sell that coin to you? If so, it is fine with me if you say so in public. And, assuming it was treated with iodine, I admittedly missed it.

Goldbully · February 21, 2011 12:18PM

Who didn't know this?????

*********************************************************************************************************

Gold Leaching with Iodine
Iodine
This is a purplish-black and crystalline solid that has been investigated as a complexing reagent in gold leaching. There are some potential advantages such as the minimization of contamination and the small requirements for a tailings disposal system. One of the aspects studied have been how to recycle iodine to the process. Since the cost of the process is influenced by the addition of iodine, this is a key part of the successful application of the process. Other issue is the solubility of iodine which must be enhanced by the addition of alkaline compound of sodium or potassium. Some researches try to include a reoxidation stage so that iodine can be reuse in the leaching process again. However, the economy of the process is affected if the oxidized agent is not rightly selected. Most of works tested chlorine compounds and iron sulphide minerals such pyrite or marcasite.
Other fundamental aspect of this gold leaching system is the iodide/iodine ratio and this value must be 2:1. The presence of iodide promotes the solubility of gold. Basically, the iodide/iodine ratio is influenced by the gold ore type. The process is described by the following reactions,
2Au + I- + I3- = 2AuI2-
2Au + 3I3- = 2AuI4- + I-
When the process reached stability, the leaching of gold starts and the solution can be reused in the process again. Iodine forms the most stable gold complexes of other halogens tested on gold leaching. When the process is practiced electrolytically, the efficiency and economy are improved due to the addition of iodine is reduced. The pregnant solution can be treated with activated carbon, ion exchange resins or cementation, but the loading efficiency of carbon and resins is low due to the simultaneous adsorption of gold iodine complex and iodine. Cementation trends to promote more oxidation than necessary and most of zinc powder could be dissolved.

Linky Dinky

RYK · February 21, 2011 12:21PM

<< 

<< I have been told that this coin may have been previously iodined (see disclaimer posted previously):

>>

Did I sell that coin to you? If so, it is fine with me if you say so in public. And, assuming it was treated with iodine, I admittedly missed it.

>>

No, you did not sell me this coin.

AnkurJ · February 21, 2011 12:43PM

Which areas does it show...I would probably miss it if someone showed me the coin and asked me.

rld14 · February 21, 2011 6:00PM

<< I have been told that this coin may have been previously iodined (see disclaimer posted previously):

>>

Is it the smear above the "EN" in "TEN" that I should be paying attention to?

Thanks for posting it regardless.

PerryHall · February 21, 2011 9:17PM

That's a really nice looking $10 Liberty. Does the iodine really tone the coin (chemical reaction) or does it just stain the coin? Can the iodine be easily removed with acetone or does something stronger need to be used?

RYK · February 21, 2011 9:19PM

The coin is too orange. If you look at it and compare it to other gold coins, it becomes more apparent, but it is a nuance that is difficult to convey in a single image. Perhaps I should bring the coin with me to the Chicago ANA for forum members who would like to see it in person...and then consign to Heritage.

ricko · February 21, 2011 9:25PM

Hmmm I must spend some time in my laboratory. Have not done anything with gold and iodine. Will report back. Cheers, RickO

llafoe · February 21, 2011 9:35PM

<< Hmmm I must spend some time in my laboratory. Have not done anything with gold and iodine. Will report back. Cheers, RickO >>

Steve27 · February 21, 2011 10:27PM

Apparently, gold will absorb a small amount of iodine and the only way to remove it is to buff it out.

Prethen · October 28, 2013 4:49AM

Curious...no pix? what would be the telltale signs? Does generic gold get iodined, like generic Saints?

jmj3esq · October 28, 2013 6:24AM

Never heard of it.

CoinZip · October 28, 2013 7:00AM

I can not see the images......it wants me to login to https://www.icloud.com/

halfhunter · October 28, 2013 9:18AM

I can't see them either but I guessed that since the thread is over 2 years old, that the pics had been either moved or removed since.

I know in Photobucket, when I move pictures from one folder to another, they go POOF anywhere that I had them posted . . . Very frustrating ! ! !

HH

determined · October 28, 2013 12:53PM

<< I can't see them either but I guessed that since the thread is over 2 years old, that the pics had been either moved or removed since.

I know in Photobucket, when I move pictures from one folder to another, they go POOF anywhere that I had them posted . . . Very frustrating ! ! !

HH >>

I hope they increase the forum picture posting size limit with the rumored forum changes coming up. That way pictures can be hosted by the forum and the pictures will stay with the thread, well, forever. Unlike photobucket or other outside hosting in which the picture is lost when the poster, moves on to another hosting service, or dies, or whatever. Even just moving the picture to another Photobucket folder and the picture to the thread is lost.

Even just to double the picture size limit to 100 kb would help a little. But even 100 kb is a small, out of date, forum size limit. Digital storage is cheap nowadays. In fact I bet many of us could already store the entire forum on our home computer. Increasing the forum picture limit should not be expensive.

This thread is a good example of how some threads are almost useless without the accompanying pictures. And there are many older valuable and informative threads in the archives that also suffer from missing pictures. It's a shame those have been lost.

A picture is worth a thousand words.

And I hope someone can post a picture of an iodine treated coin.

yosclimber · October 28, 2013 3:23PM

google image search found an MS-62 which CAC would not approve due to iodine, at:
http://boards.collectors-society.com/ubbthreads.php?ubb=showflat&Number=4619178

ColonelJessup · October 29, 2013 2:13AM

Very popular until maybe 10 years ago, then the TPG's caught on. The expectation that this knowledge is highly available and (pun intended) absorbable is misplaced.

Seemed to work better on circ. gold, which already has that "lived-in" look. Betcha the Sniffer knows this trick

Wonder if Restoration Service can ameliorate the effects without making the coin too "raw" in coloration.

SethChandler · October 29, 2013 2:17AM

Yes, I would love to see a few pics.......

What % of currently graded Three's have this issue? SWAG?

ColonelJessup · October 29, 2013 4:38AM

The use of this process is in no way limited to the $3 series.

RYK · October 29, 2013 4:43AM

<< I can not see the images......it wants me to login to https://www.icloud.com/ >>

That was previously Apple's hosting site, mobileme. It does not exist any longer. I will see if I have the images of the coin.

ColonelJessup · October 29, 2013 5:01AM

IIRC PCGS has a collection of images of doctored coins which might be useful as a visual reference intended to throw more light on the topic.

IIRC

BillJones · October 29, 2013 6:52AM

I have my suspicions that this piece has had the treatment.

ColonelJessup · October 29, 2013 7:12AM

<< I have my suspicions that this piece has had the treatment.

>>

Named that tune in one note.... sigh

georgiacop50 · October 29, 2013 10:23PM

<< Betcha the Sniffer knows this trick

. >>

Yes. I bet it is even detectable w/ human nose. Iodine has a very distinctive pleasant odor...

topstuf · February 21, 2017 4:40PM

Iodine is good to put on scratches.

Any pictures of old gold that have been AT'd with IODINE?

Comments

Leave a Comment