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 Post subject: Re: D Flawless, Type IIb
PostPosted: Tue Nov 01, 2011 1:12 pm 
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 Post subject: Re: D Flawless, Type IIb
PostPosted: Tue Nov 01, 2011 3:59 pm 
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Fantastic :D :D

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 Post subject: Re: D Flawless, Type IIb
PostPosted: Wed Nov 02, 2011 7:20 am 
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llb diamonds are almost or entirely devoid of impurities, and consequently are usually colourless and have the highest thermal conductivity.


Last edited by cryst on Thu Nov 03, 2011 7:28 am, edited 1 time in total.

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 Post subject: Re: D Flawless, Type IIb
PostPosted: Wed Nov 02, 2011 7:57 pm 
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Type IIb diamonds usually contain boron, and are commonly blue or blue/gray.
Colorless type IIb are quite unusual as I understand it.


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 Post subject: Re: D Flawless, Type IIb
PostPosted: Thu Nov 10, 2011 3:27 pm 
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The type IIb either natural or synthetic, are bluish, blue or bluish grey in their original state. Natural type IIb diamonds may have received lattice crystal damage, leading to a brown secondary color or colorless/near colorless. the lattice defects can be restored by a HPHT treatment, but no one can predict what color it gets after the treatment, also Flawless clarity is very suitable for HPHT color treatment but in this case the D color itself is pleasant and rare , maybe future owner of this stone someday wish to do HPHT to restore the Blue, i wouldn't do it but some one might!

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 Post subject: Re: D Flawless, Type IIb
PostPosted: Fri Nov 11, 2011 1:26 am 
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roshanravan wrote:
The type IIb either natural or synthetic, are bluish, blue or bluish grey in their original state. Natural type IIb diamonds may have received lattice crystal damage, leading to a brown secondary color or colorless/near colorless. the lattice defects can be restored by a HPHT treatment, but no one can predict what color it gets after the treatment, also Flawless clarity is very suitable for HPHT color treatment but in this case the D color itself is pleasant and rare , maybe future owner of this stone someday wish to do HPHT to restore the Blue, i wouldn't do it but some one might!

I'm not sure I agree with many of the points here.


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 Post subject: Re: D Flawless, Type IIb
PostPosted: Fri Nov 11, 2011 2:54 am 
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Barbra Voltaire wrote:
I'm not sure I agree with many of the points here.

do you mean technically or if ever some one do hpht on colorless to near color less type IIb diamonds?

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 Post subject: Re: D Flawless, Type IIb
PostPosted: Sat Nov 12, 2011 1:22 am 
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While we are on the topic of unusual D Flawless Diamonds, have you seen the description of the Type IIa, D Flawless, 33+ CARAT, coming up for auction at Sotheby?
Known as: "The Light or Star of Golconda”"
This is worth a click!
Direct link to pdf:
http://files.shareholder.com/downloads/ ... 513796.pdf


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 Post subject: Re: D Flawless, Type IIb
PostPosted: Sat Nov 12, 2011 9:00 am 
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:smt001 stunned not only by the blue but also Barbra's use of 2 cool's and an awesome in a 3 word sentence. 8)

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 Post subject: Re: D Flawless, Type IIb
PostPosted: Sat Nov 12, 2011 12:59 pm 
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Yep!!

WAY COOL!!!

Thanks for sharing

That is a Rare One for sure.

Wish I could put it in my collection

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 Post subject: Re: D Flawless, Type IIb
PostPosted: Sat Nov 12, 2011 1:38 pm 
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La Shawn, that's qute the alphabet soup you've got going on there! :wink:

Barbra: lucky you, getting to play with that for a while! That's a truly awesome stone.


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 Post subject: Re: D Flawless, Type IIb
PostPosted: Fri Dec 09, 2011 11:23 am 
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WOW! Now this beauty has made itself to G&G :D

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 Post subject: Re: D Flawless, Type IIb
PostPosted: Fri Dec 09, 2011 11:39 am 
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Yes. The photos In the G&G Gem Brief are better than the ones I posted as well.
I was interested to also read about the diamond's thermoluminescence. We couldn't test for that at the shop. :wink:


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 Post subject: Re: D Flawless, Type IIb
PostPosted: Sun Jan 01, 2012 9:19 pm 
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Whoa, that one took my breath away.

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 Post subject: Re: D Flawless, Type IIb
PostPosted: Sun Jan 01, 2012 10:50 pm 
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Is there a way to see the G&G Gem Brief without being a G&G subscriber? [wants to see the pretty pictures]

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