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RCC zircon from Burma
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=6&t=25039
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Author:  CLwong999 [ Sat Mar 09, 2019 5:43 am ]
Post subject:  RCC zircon from Burma

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
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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
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File comment: Burma RCC Zircon-3
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File comment: Burma RCC Zircon5
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Author:  Barbra Voltaire, FGG [ Sat Mar 09, 2019 6:09 pm ]
Post subject:  Re: RCC zircon from Burma

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.

Author:  Stephen Challener [ Sat Mar 09, 2019 7:42 pm ]
Post subject:  Re: RCC zircon from Burma

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.

Author:  CLwong999 [ Sun Mar 10, 2019 12:25 am ]
Post subject:  Re: RCC zircon from Burma

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.

Author:  CLwong999 [ Sun Mar 10, 2019 12:29 am ]
Post subject:  Re: RCC zircon from Burma

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.

Author:  Barbra Voltaire, FGG [ Sun Mar 10, 2019 12:54 pm ]
Post subject:  Re: RCC zircon from Burma

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.

Author:  Marlow [ Sun Mar 10, 2019 4:04 pm ]
Post subject:  Re: RCC zircon from Burma

@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

Author:  CLwong999 [ Mon Mar 11, 2019 12:48 am ]
Post subject:  Re: RCC zircon from Burma

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?

Author:  CLwong999 [ Mon Mar 11, 2019 12:50 am ]
Post subject:  Re: RCC zircon from Burma

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?

Author:  Marlow [ Mon Mar 11, 2019 1:02 pm ]
Post subject:  Re: RCC zircon from Burma

=D> Congratulations

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

Author:  Stephen Challener [ Mon Mar 11, 2019 9:44 pm ]
Post subject:  Re: RCC zircon from Burma

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.

Author:  Barbra Voltaire, FGG [ Tue Mar 12, 2019 12:07 am ]
Post subject:  Re: RCC zircon from Burma

And price is an important factor.

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