CIBJO releases Gemmological Special Report: considers process of separating measurable facts from opinion; See Gemological Articles below.
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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sun Sep 26, 2010 9:30 pm 
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Quote:
: The mineral is Ba, Ti, V and Cr oxide!


ankangite then. I didn't know of this mineral. Nice piece


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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Mon Sep 27, 2010 3:47 am 
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YES !!!

Congatulations!

Here is your...
Image


And colorless mineral in the second photo seems to be Celsian, rare Ba-feldspar.
These inclusions were mentioned in this GO thread.
See also Gems&Gemology, Spring 2009, 71-72 pp.

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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Mon Sep 27, 2010 10:35 am 
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do you know where such ankangite included quartz are beeing found exactly?


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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Mon Sep 27, 2010 10:56 am 
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No, I don't. If somebody knows the exact locality, please tell me.

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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Mon Sep 27, 2010 11:03 am 
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There is an add for some on eBay here indicating Brazil as local:
http://cgi.ebay.com.sg/QUARTZ-ANKANGITE ... 0407796441

and I found another reference listing the source as Corinto Region, Minas Gerais, Brazil.


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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Mon Sep 27, 2010 5:04 pm 
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Barbra Voltaire wrote:
There is an add for some on eBay here indicating Brazil as local:
http://cgi.ebay.com.sg/QUARTZ-ANKANGITE ... 0407796441

and I found another reference listing the source as Corinto Region, Minas Gerais, Brazil.



Thanks for the references!!!

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