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 Post subject: RCC zircon from Burma
PostPosted: Sat Mar 09, 2019 5:43 am 
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Hi All,

I just bought a natural Reverse Colour Change zircon from a burma dealer,
Is this kind of RCC normally heated?

Attachment:
File comment: Burma RCC Zircon-1
mmexport1552123935496.jpg
mmexport1552123935496.jpg [ 2.65 MiB | Viewed 372 times ]


Attachment:
File comment: Burma RCC Zircon-2
mmexport1552123940008.jpg
mmexport1552123940008.jpg [ 3.3 MiB | Viewed 372 times ]


I also heard there is natural Red-Green Zircon insist.
Is that real, if so, where is the origin then?

Newly collected on this month
10ct+ stone from burma
Attachment:
File comment: Burma RCC Zircon-4
mmexport1552123924601.jpg
mmexport1552123924601.jpg [ 3.26 MiB | Viewed 310 times ]

Attachment:
File comment: Burma RCC Zircon-3
mmexport1552123913813.jpg
mmexport1552123913813.jpg [ 2.4 MiB | Viewed 310 times ]

Attachment:
File comment: Burma RCC Zircon5
IMG_20190313_230128.jpg
IMG_20190313_230128.jpg [ 878.45 KiB | Viewed 227 times ]


Last edited by CLwong999 on Wed Mar 13, 2019 11:09 am, edited 3 times in total.

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 Post subject: Re: RCC zircon from Burma
PostPosted: Sat Mar 09, 2019 6:09 pm 
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I moved this post to a more appropriate area.
What is RRC zircon?

Routinely blue zircon has been heated.

Reddish zircon exists and green zircon exists.
Image
Image

Green zircon is usually metamict.


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 Post subject: Re: RCC zircon from Burma
PostPosted: Sat Mar 09, 2019 7:42 pm 
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I don't think zircon ever naturally comes in dark blue. All of these stones are heated in a reducing atmosphere. I have a vague memory of some very light blue stones occasionally being found? Even that might be contentious.

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 Post subject: Re: RCC zircon from Burma
PostPosted: Sun Mar 10, 2019 12:25 am 
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CLwong999 wrote:
Hi All,

I just bought a RCC zircon from a burma dealer,
Is this kind of RCC normally heated?

Attachment:
mmexport1552123935496.jpg


Attachment:
mmexport1552123940008.jpg


I also heard there is natural Red-Green Zircon insist.
Is that real, if so, where is the origin then?



Sorry
The RCC is short for Reverse Colour Change,
I found records of the changes 2 types
from light brown to Red
and from Blue to Green
under different light sourses.


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 Post subject: Re: RCC zircon from Burma
PostPosted: Sun Mar 10, 2019 12:29 am 
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Stephen Challener wrote:
I don't think zircon ever naturally comes in dark blue. All of these stones are heated in a reducing atmosphere. I have a vague memory of some very light blue stones occasionally being found? Even that might be contentious.



Yes,
I collected some faceted purple zircon from Burma,
But could not confirm the origin, some said from Vietnam.
But no heat evidence been found.


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 Post subject: Re: RCC zircon from Burma
PostPosted: Sun Mar 10, 2019 12:54 pm 
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Regarding color change zircon, here is a thread from 2007
viewtopic.php?t=2632

Here is a brief article by Oliver Waldis who I consider one of the most gifted gem/mineral explorers I have ever met. Curiosities just seem to call to him, "Over here Oliver, I'm right over here."

https://mineralgypsies.wixsite.com/gems ... nge-zircon

Sidebar: I have never been with Oliver when he wasn't able to pull a wondrous gemstone out of his pocket.


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 Post subject: Re: RCC zircon from Burma
PostPosted: Sun Mar 10, 2019 4:04 pm 
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@CLwong999

WOOW - YOU KILL ME WITH THAT STONE!!! :smt007 :smt007

Reverse CC is always violet/blue in DAYLIGHT to greenblue or green in INCANDESCENT LIGHT.

They are heated - I posted mine here too and Oliver Waldis replied kindly. Check SSEF for further information - a short article in G&G too.

viewtopic.php?f=6&t=23809

Check the spectrum - the typical „jail bars“ you will see.

Some short videos on my Instagram account...

First two compared to a brazilian alexandrite

https://www.instagram.com/p/Bh1Qg9GhR-3 ... bdku43lj8y

https://www.instagram.com/p/Bh1Q52BhmZY ... tzhbml8y29

Last using a London dicroscope

https://www.instagram.com/p/Bh1QCwDBJcj ... z2neyux3r9

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 Post subject: Re: RCC zircon from Burma
PostPosted: Mon Mar 11, 2019 12:48 am 
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Barbra Voltaire wrote:
Regarding color change zircon, here is a thread from 2007
viewtopic.php?t=2632

Here is a brief article by Oliver Waldis who I consider one of the most gifted gem/mineral explorers I have ever met. Curiosities just seem to call to him, "Over here Oliver, I'm right over here."

https://mineralgypsies.wixsite.com/gems ... nge-zircon

Sidebar: I have never been with Oliver when he wasn't able to pull a wondrous gemstone out of his pocket.



Thank you so much for your infos,
Really helpful to know it more,
Will this kind of zircon consider as rare if above 10ct?


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 Post subject: Re: RCC zircon from Burma
PostPosted: Mon Mar 11, 2019 12:50 am 
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Marlow wrote:
@CLwong999

WOOW - YOU KILL ME WITH THAT STONE!!! :smt007 :smt007

Reverse CC is always violet/blue in DAYLIGHT to greenblue or green in INCANDESCENT LIGHT.

They are heated - I posted mine here too and Oliver Waldis replied kindly. Check SSEF for further information - a short article in G&G too.

viewtopic.php?f=6&t=23809

Check the spectrum - the typical „jail bars“ you will see.

Some short videos on my Instagram account...

First two compared to a brazilian alexandrite

https://www.instagram.com/p/Bh1Qg9GhR-3 ... bdku43lj8y

https://www.instagram.com/p/Bh1Q52BhmZY ... tzhbml8y29

Last using a London dicroscope

https://www.instagram.com/p/Bh1QCwDBJcj ... z2neyux3r9



Many thanks for your kind infos.

Recently I found another 10ct size RCC zircon,
will it worth to buy as a collecting piece?
Do you have any suggestion about this?
What is the odds to get this kind of effect after heating?


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 Post subject: Re: RCC zircon from Burma
PostPosted: Mon Mar 11, 2019 1:02 pm 
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=D> Congratulations

Both are very nice! Quite a bit jealous...

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 Post subject: Re: RCC zircon from Burma
PostPosted: Mon Mar 11, 2019 9:44 pm 
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CLwong999 wrote:
will it worth to buy as a collecting piece?
Do you have any suggestion about this?

Only you can answer this question. In a general sense, it's a relatively rare, and quite attractive, variant of a somewhat popular gem, and it has a strong 'nifty' factor. But for collecting it comes down to whether you want it or not, and how it fits in with whatever else is in your collection.

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 Post subject: Re: RCC zircon from Burma
PostPosted: Tue Mar 12, 2019 12:07 am 
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And price is an important factor.


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