December 14-16—SAN DIEGO, CALIFORNIA: Wholesale and retail show; Gem Faire Inc.; Scottish Rite Center, 1895 Camino del Rio S; Fri. 12-6, Sat. 10-6, Sun. 10-5
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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Tue Sep 18, 2018 6:38 am 
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What size ? Weight ? Good luck !


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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Tue Sep 18, 2018 9:29 am 
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Flat, windowed....def. not exceptional...

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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Tue Sep 18, 2018 9:37 am 
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Been 24 hours, no response from dealer yet. Someone may have beaten me to it.


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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Tue Sep 18, 2018 10:10 am 
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So sad - such a beautiful stone...

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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Tue Sep 18, 2018 10:38 pm 
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Got stone, should have in a few days.

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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Tue Sep 18, 2018 11:37 pm 
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=D> Great!! A collector!!

Please post pics..

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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Tue Sep 18, 2018 11:50 pm 
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Nicky Newark wrote:
Got stone, should have in a few days.


=D> =D>
Congrats, nice catch.


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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Fri Sep 21, 2018 2:30 pm 
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I took these two photos about 2 months ago. The color on both these pieces is phenomenal. I don't know the weight...(didn't mess with taking that info down)... you can tell size reference in the picture. Probably along the order of .06cts-.15cts.... if I had to guess.

Anyone want to try slapping a couple facets on some sub carat sized pieces of these? I'll send you some and we can work out a trade where we split whatever can be polished and or/cut.


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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Thu Sep 27, 2018 8:57 pm 
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Did you receive the stone? Are you happy with it?


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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Fri Sep 28, 2018 9:43 am 
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Yes--the stone is very nice. The dealer's photo is very accurate, the one's I took look blurry. I will try again this weekend. I think in cobalt spinel location is pretty important. Next time I'm in Manhattan I'll drop off at AGL for an origin report to verify Vietnam location.


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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Fri Sep 28, 2018 1:25 pm 
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It's important because the sri lankan stones don't range into that same electric color (as far as I know ever, certainly not typically). Aside from those two and the specimens from Pakistan does anywhere else even produce cobalt spinel?


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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Fri Sep 28, 2018 3:50 pm 
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Stephen Challener wrote:
It's important because the sri lankan stones don't range into that same electric color (as far as I know ever, certainly not typically). Aside from those two and the specimens from Pakistan does anywhere else even produce cobalt spinel?


Sri Lanka produces the same color but they are extremely rare.
Nomads offered two years ago an incredible fine cushion - 2 ct+...maybe „dioptase“ can post a pic....

A problem are now smaller but fine colored stones like this one

https://www.gemrockauctions.com/auction ... 970-729852

treated spinel (cobalt diffusion) - small, some inclusions but not the ugly large stones formerly known. But could be a challenge to identify.
And synthetic spinel (flux) with identical RI like the natural counterpart are maybe a problem too.

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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Fri Sep 28, 2018 8:51 pm 
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Marlow wrote:
Sri Lanka produces the same color but they are extremely rare.
Nomads offered two years ago an incredible fine cushion - 2 ct+...maybe „dioptase“ can post a pic....


Image
This one?
Color wise they are on par with the best Vietnamese material, and certainly they are outliers compared to more "classic" Sri Lankan cobalt spinels with their darker toned blues.

They are really rare, though. Probably even harder to find than the Luc Yen stones.


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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Fri Sep 28, 2018 10:43 pm 
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Yes - this one....

Thank you!

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 Post subject: Re: Luc Yen cobalt blue spinel.
PostPosted: Sat Sep 29, 2018 2:12 am 
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Wow, that is excellent! Would Luc Yen actually command a premium over those? I would guess not but couldn't say for sure.


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