CIBJO releases Gemmological Special Report: considers process of separating measurable facts from opinion; See Gemological Articles below.
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 Post subject: Do they burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 12:52 am 
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Still working on my project and trying to figure out what is treated outside corundum? do they treat any other stones here? and do they do anything else other than burn (obviously including, filling, diffusion etc) - irradiation? oiling?

Hoping to visit chantaburi next weekend to see for myself!

Thanks for any leads!

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 Post subject: Re: Do thais burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 3:54 am 
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Hey Lucy,

They can and will treat anything that is possible to be treated.

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 Post subject: Re: Do thais burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 5:15 am 
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Thanks Jean-Michel

I have contacted Ted and quite a few others. So hoping to get some good info.

Im reading through stuff like a geek but just not coming across the answers I need. I want to know what they are treating here other than ruby and sapphire and how - so then I can do more specific research and decide what I want to see when I visit chantaburi

Im sure they can treat anything but I want to know what they generally treat commercially, and if they can do anything else but burning - e.g. irradiation

I don't know if people just don't know whats being treated here, or if it is just ruby and sapphire, but Im finding it so hard to get an answer to this question :(

Thanks again!
Lucy

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 Post subject: Re: Do thais burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 5:39 am 
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hey Lucy,

i wouldn't be too much optimistic about thai burner willing to share they treatment processes....... neverthless i wish you success!!
ciao
alberto

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 Post subject: Re: Do thais burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 6:23 am 
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Thanks Alberto! I don't want to know the details, just if they are treating anything other than corundum :)

I think Im changing my project anyway to a brief overview of the thai gem industry! I have another assignment to write on jewellery so I just have to get this done with, spending way to much time reading the same stuff over and over :/ Oh well, I tried :)

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 Post subject: Re: Do they burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 12:16 pm 
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Hi Lucy,
Ted is the man to talk to, of course. Corundum takes the abuse better than any other so it is the most commonly heated. Often other rough comes into Chan untreated and these guys will take care of it.
Zircons are often heated, Spessartite sometimes, Spinel sometimes, Tanzanite sometimes, Aquamarine often, and others.
I have never heard that radiation treatment is done here though.
Gonna be in Bangkok this coming week and then Chan this coming weekend, maybe see ya, Lee

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 Post subject: Re: Do they burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 12:35 pm 
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Yes, Lucy everything which can be treated IS being treated.

As Lee pointed out, most of the treatment facilities in Thailand are equipped to heat, diffuse and fill, not irradiate.

But without very specific details, which as Alberto said you will most likely not get, it would not make for a very interesting report.

I find the most scientifically accurate treatment information is researched and published by Dr. John Emmett, Crystal Chemistry.
As I've said before, that is the direction I would go if I were doing a report on the current state of treatments.


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 Post subject: Re: Do they burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 1:41 pm 
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In Thailand every type of treatment of gemstone can be done.

For successful trip and want to complete your project successfully, first you visit GIA, AIGS or other gemological institutes or gems testing labs which are in Bangkok, Thailand.
Meet GIA or AIGS teachers or gemologist and discuss your matter with them. They will help you regarding the treatment center locations and address.
because it is not necessary that all the treatment centers will located in chantaburi.

some links about the radiation treatment of gemstone in Thailand

http://en.wikipedia.org/wiki/Gemstone_irradiation

http://www.aigslaboratory.com/%28A%28qi ... eSupport=1


with best regards

HUK

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 Post subject: Re: Do they burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 1:49 pm 
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I've skimmed the articles. They address radiation treatment, but I'm missing the art about facilities in Thailand.

Am I overlooking the specifics?

And, while in Thailand, excellent tips: visit GIA and AIGS. If you can meet up with Vincent Padieu you will be very fortunate.


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 Post subject: Re: Do they burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 1:54 pm 
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:D
http://www.sterigenics.com/gems.htm

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 Post subject: Re: Do they burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 2:06 pm 
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Thanks.
Excellent update.
I stand corrected.
Everything that can be done to gems is being done in Thailand.


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 Post subject: Re: Do they burn anything else other than corundum?
PostPosted: Sun Aug 05, 2012 10:19 pm 
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Well, it figures that they would do something like that in Bangkok as that place does not seem like Thailand to me. People say that you can get anything in Bangkok and it seems more true all the time.
I understand that there are two ways to irradiate gemstones and correct me if I am wrong but this new facility uses the type that is potentially much more dangerous to the consumer.
So I wonder then how much testing is done on these gems to be sure they are safe when distributed into the market. Some Americans think that they are protected by laws but with certainty those US laws have little to no effect on small transactions in foreign countries that include small dealers carrying in or shipping in undisclosed parcels that will never be inspected by any US official with a Geiger counter. Hmmmm.

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 Post subject: Re: Do they burn anything else other than corundum?
PostPosted: Mon Aug 06, 2012 6:41 am 
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Thanks so much guys, I also had some great feedback from Dick Hughes so I'm a happy camper. TBH Barbara, I don't expect a report thats going to blow anyones mind, just a merit or distinction for my gem-a would be great!

I met with vincent a few weeks back unfortunately he's off on his travels again! otherwise I would have love to pick his brain some more! but I think I'm on it now :)

Cheers from rainy thailand!
Lucy

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