New Mineral Named After GIA’s John Koivula
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 Post subject: Re: Blue colour change garnets
PostPosted: Sat Jun 22, 2019 10:56 am 
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just wanted to share another one, I got a parcel of very small ones this time but with a lovely neon colour -


Image


Just proves, size doesn't matter :)


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 Post subject: Re: Blue colour change garnets
PostPosted: Tue Jun 25, 2019 1:13 am 
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Nice cc garnets! Do you know the location they're from?

I have a couple of Bekily cc garnets, and a small handful of different sort of cc garnet from Tanzania. I find the Tanzanian stones go more from yellowish green to red, but the occasional one that goes greyish blue to red.

I haven't cut many of them and this thread just reminded me I should!

Thanks for sharing

-Allan

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Allan Aoyama
http://www.omnifaceter.net <- Omnifaceter is back online!


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 Post subject: Re: Blue colour change garnets
PostPosted: Tue Jun 25, 2019 1:27 am 
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Wanna sell one?
I'd love to test it on the Raman.


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 Post subject: Re: Blue colour change garnets
PostPosted: Tue Jun 25, 2019 8:24 am 
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gembug wrote:
Nice cc garnets! Do you know the location they're from?

I have a couple of Bekily cc garnets, and a small handful of different sort of cc garnet from Tanzania. I find the Tanzanian stones go more from yellowish green to red, but the occasional one that goes greyish blue to red.

I haven't cut many of them and this thread just reminded me I should!

Thanks for sharing

-Allan


Thanks Allan, seller stated Madagascar.

I agree about the Tanzanian garnets, theres a lot of the greenish yellow to red coming out of the area for the last decade.


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 Post subject: Re: Blue colour change garnets
PostPosted: Tue Jun 25, 2019 8:27 am 
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Barbra Voltaire wrote:
Wanna sell one?
I'd love to test it on the Raman.


Barbra, Id be happy to send a small one to you at no charge
They are very small so be warned !
Please PM me the address you want it sent to and Ill send it by snail mail as before :)


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 Post subject: Re: Blue colour change garnets
PostPosted: Fri Jul 19, 2019 5:32 pm 
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The wondrous gem has arrived.
When Raj said it would be small, I was expecting a 3 pointer.
This gem is beautifully cut and weighs in at a whopping 0.35 carat.

I took these color change shots with an incandescent Kruss fiberoptic cable and a System Eichkorst Daylight USB LED pin-pointer fiberoptic:
ImageImage
GemmoRaman Scan:
Pyralspite
Image

The inclusions I noticed were rutile needles, in two directions with a 70º intersection, a planer circular liquid veil and some xls, I couldn't identify. Please feel free to share your opinion of what they may be.

Image

More info on this type of Color Change Garnet:


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 Post subject: Re: Blue colour change garnets
PostPosted: Sat Jul 20, 2019 6:14 am 
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:D thanks for taking the time to do this Barbra, Im very pleased you like it.
Hopefully Ill get some larger ones upon my next trip.

Love that article too!


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 Post subject: Re: Blue colour change garnets
PostPosted: Sat Jul 20, 2019 12:36 pm 
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One thing I forgot...this stone jumps towards a rare earth magnet.



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