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Author Topic: R2354-Why no chameleon?  (Read 573 times)
GIAGirl
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« on: June 21, 2008, 01:40:59 PM »
David,
When a stone like this comes to the GIA...what tips them off that it may or may not be a chameleon. 

In other words, could this stone go back and get identified as a chameleon or is it cut and dry with spectometry? 
R2354
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« Reply #1 on: June 21, 2008, 02:55:28 PM »
 david

I'll flag this for the diamond expert, David. Boy, that has great color.
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Mikla
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« Reply #2 on: June 21, 2008, 03:32:08 PM »
 wow  That is such an unusual color.  How would something like this be set?

You know me, I need pictures!

 picturewhore Mikla
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GIAGirl
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« Reply #3 on: June 21, 2008, 04:19:51 PM »
Maybe Citygirl could answer this one as well. 
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GIAGirl
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« Reply #4 on: June 21, 2008, 04:28:57 PM »
I meant Spectrometry Cool
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oldmancoyote
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« Reply #5 on: June 21, 2008, 04:46:37 PM »
Don't worry. David can read through typos no problem.

Proof? Just look here and search for "rain"

(not an answer to your question, but funny typo nevertheless)

Oh, and the answer to your question seems to be "cut and dried with spectroscopy". See here and here
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Mikla
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« Reply #6 on: June 21, 2008, 06:05:30 PM »
Got it!

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GIAGirl
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« Reply #7 on: June 22, 2008, 01:47:21 AM »
Did your typo get corrected or did I just read through it as well?  Crazy how the brain works or doesn't work...however you choose to see it. 

Thank you for the articles OMC...good to know...I think that answers my question...true chameleons can be visible through spectroscpy.  Then some diamonds change colors due to the ultra violet light stimulation of their green or yellow luminescence.  COOL!   
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Mikla
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« Reply #8 on: June 22, 2008, 07:23:14 AM »
Nope, it's still there.  I had to read through it like three or four times before I found it.

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joia
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« Reply #9 on: June 22, 2008, 07:51:01 AM »
So customers have to provide their own rain???   hmmmmm.

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oldmancoyote
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« Reply #10 on: June 22, 2008, 02:44:43 PM »
Which would imply that most customers are rainmakers. Alas, not (at least not in my case)
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Diamondsbylauren
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« Reply #11 on: June 22, 2008, 03:12:48 PM »
Thank you for providing such excellent info OMC!

I would not have been able to answer that particular question GIAgirl- I don't believe it is part of a GG's education, although CityGirl can confirm than one.


Thank you too for the prooof reading skill.
My dictation program, which is a real time saver- but occasionally, it, and I, miss a word which is misquoted.
The damn thing never makes a spelling mistakes, but sometimes misquotes words.

When I don't catch these errors, it can make for some funny, or horribly wrong results.....

Thank you , you old (married) coyote
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GIAGirl
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« Reply #12 on: June 23, 2008, 01:43:13 AM »
Well, David, what tips you off to send a particular stone, thinking it is a chameleon?  My thought is that some of them slip in places without people noticing.
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CityGirl
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« Reply #13 on: June 23, 2008, 01:25:05 PM »
David's right,  we didn't go into very much detail about chameleon diamonds in the GIA class.  I don't even want to venture a guess because I really don't know much about them!!  GIAgirl you mentioned flourescence and spectroscopy... I do believe those 2 test might be the ones that tip off the lab that the diamond could be a chameleon.  I'll try to find out some more info!

Cori heart2
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CityGirl
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« Reply #14 on: June 23, 2008, 04:16:54 PM »
ok, some more info has been obtained  Smiley

We have an "insider" at GIA who was able to clear up this issue for us all.  Turns out, chameleon stones will have a certain body color/fluorescence/spectrum combination that tips off the lab that it might be a chameleon.  Then more direct tests are performed to confirm the suspicion. They will do these confirmation tests anytime they feel a chameleon is a possibility and without any prompting from the owner/submitter. 

So there ya have it, if anyone has any more questions please let us know.  Like I said, we do have a contact at the GIA who can provide information which may be beyond my meager and David's quite extensive knowledge!
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« Reply #15 on: June 23, 2008, 04:33:40 PM »
You've sailed right past any knowledge I might have. Thanks Cori. I think you're a big asset with connections no less.
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GIAGirl
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« Reply #16 on: June 23, 2008, 05:27:28 PM »
Thanks.  That is good to know.  I mean that little green radiant that David has was a find...If I got the diamond above I would say "You are still a chameleon to me, diamond."   I really would. 
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« Reply #17 on: June 23, 2008, 08:26:04 PM »
Quote from: webmistress on June 23, 2008, 04:33:40 PM
You've sailed right past any knowledge I might have. Thanks Cori. I think you're a big asset with connections no less.


MER Roll Eyes  I don't want to take credit that doesn't belong to me!!  This particular GIA  informant is a connection through David, not me hehe  Grin   Just wanted to se the record straight!
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