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 Post subject: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 6:58 am 
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Dodgy Thursday. Had this "yellow Sapphire" come across my desk today accompanied by a lab report. As always I did my own test. Turns out the RI is 1.61 to 1.62, meaning the stone is actually Topaz, not Sapphire. The yellow color is due to the stone being dyed. Small traces of the dye can be seen in the last picture.

I find it funny that they will incorrectly identify the stone (and state the tested RI and SG no less) but when it comes to treatment, they still list is as Hue Enhanced (very ambiguous).

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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 7:18 am 
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Update on the little Sapphire, I mean Topaz. Left it in a bag of Acetone (nail polish remover) and would you look at that, the stone is colourless and the liquid is now yellow. Any want a make of Sapphire juice?

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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 8:29 am 
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as i said before there are plenty of phoney Labs and Reports for scam purposes

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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 1:18 pm 
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There are also several individuals who fake lab reports. Contact the lab and see if they issued that report.


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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 5:10 pm 
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It looks like the cut on that sucker may also qualify for the Lapiderpy thread!

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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 8:40 pm 
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SedaGems wrote:
Turns out the RI is 1.61 to 1.62, meaning the stone is actually Topaz, not Sapphire. The yellow color is due to the stone being dyed. Small traces of the dye can be seen in the last picture.

I find it funny that they will incorrectly identify the stone (and state the tested RI and SG no less) but when it comes to treatment, they still list is as Hue Enhanced (very ambiguous).


Are you certain the IR you recorded was done after you had removed the film of color? Did you recheck the density?
Did you determine the optic sign and birefringence with your own refractometer?

Maybe you should consider getting a Raman. I think you might owe them an apology.


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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 9:12 pm 
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[quote="SedaGems"[/quote]
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… they still list is as Hue Enhanced (very ambiguous).

That is because that lab deals with gemologists (jewelry shills) who want their certificate to say that a "treated" stone is natural and not ARTIFICIAL.


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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 11:05 pm 
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Bill Hanneman wrote:
SedaGems wrote:
Turns out the RI is 1.61 to 1.62, meaning the stone is actually Topaz, not Sapphire. The yellow color is due to the stone being dyed. Small traces of the dye can be seen in the last picture.

I find it funny that they will incorrectly identify the stone (and state the tested RI and SG no less) but when it comes to treatment, they still list is as Hue Enhanced (very ambiguous).


Are you certain the IR you recorded was done after you had removed the film of color? Did you recheck the density?
Did you determine the optic sign and birefringence with your own refractometer?

Maybe you should consider getting a Raman. I think you might owe them an apology.


I sure did, I took readings before and after. There is no mistaking that it is Topaz. Inclusions are not consistent with Sapphire either. What will Raman tell me that a simple RI test wont?

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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 11:12 pm 
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Have you contacted the lab?


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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 11:19 pm 
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Barbra Voltaire wrote:
Have you contacted the lab?


As of yet I can't find any details about them. GTLI = gemstones testing laboratory of India. Can't find them on Google and there is no contact info on the actual report. All I can find is a few ebay sellers with the reports.

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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Thu Jan 22, 2015 11:54 pm 
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Then. wouldn't that be seller fraud?


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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Fri Jan 23, 2015 7:17 am 
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i knew the lab is fake, they have FTIR and can't make a better quality Certificate Card??? even my office Color Printer can print higher DPI.

Barbra remember the Sintered Black Diamonds which has been Identified as Natural Black Diamond?? they were also from Labs in India

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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Fri Jan 23, 2015 1:40 pm 
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My point is that the sellers are creating phony, fraudulent documents.
It is not a lab creating bogus documents.
Make sense? I think we are saying the same thing, Farshid, just expressing it differently. :D


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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Fri Jan 23, 2015 6:15 pm 
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SedaGems wrote:
What will Raman tell me that a simple RI test wont?

Over to you, Alberto. :D :D


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 Post subject: Re: Yellow Sapphire With Report From GTLI
PostPosted: Fri Jan 23, 2015 6:33 pm 
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Barbra Voltaire wrote:
My point is that the sellers are creating phony, fraudulent documents.
It is not a lab creating bogus documents.
Make sense? I think we are saying the same thing, Farshid, just expressing it differently. :D

right, i mean there is no lab just someone with a computer and cheap printer and lots of mistakes, FTIR & XTI???? does it mean XRD ????

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