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 Post subject: Mysterious inclusions 2 (quite difficult one)
PostPosted: Fri Sep 24, 2010 7:41 pm 
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One more quiz for inclusions fans.
My first "mysterious inclusions" quiz was solved in one day, hope this one will still alive a little bit longer! :)
You have to identify the inclusions, the host mineral and the country of origin for this stone.

Macro view (4.47 ct stone):
Image

Micro view:
Image

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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Fri Sep 24, 2010 9:43 pm 
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Okay ... I say it was Professor Plum in the library ... oh, wait ... wrong game 8) .

I'll take a wild guess and say rutile needles in quartz from Switzerland. :-k

Whatever it is it sure is pretty :D

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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sat Sep 25, 2010 5:15 am 
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Good guess, you are going right way with quartz, but it was the simplest part of the game!

Rutile - no! It's not so common inclusion!
Switzerland - no! Think about warmer countries!

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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sat Sep 25, 2010 11:07 am 
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Awesome photos - very cool specimin!
Here is my best guess after doing some checking:
Is it a Starburst of Hollandite inclusion found in a "SpiderQuartz" from Madagascar???
Thanks so much for posting.
-Katy B


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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sat Sep 25, 2010 2:35 pm 
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Thanks for trying Katy!
Hollandite inclusions were used in my previous quiz, so in this case it's something different!

Hint: you won't find it in the Photoatlas, it's quite a new material, but in this forum these inclusions were mentioned at least in one thread!

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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sat Sep 25, 2010 5:34 pm 
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stibnite (or eventually jamesonite) in quartz from roumania? or from nevada?


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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sat Sep 25, 2010 5:45 pm 
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cascaillou wrote:
stibnite (or eventually jamesonite) in quartz from roumania? or from nevada?

Nops! [-X


Here is a new hint:
Country of origin


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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sat Sep 25, 2010 5:51 pm 
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brasil, but you say it's not stibnite nor jamesonite?


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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sat Sep 25, 2010 5:57 pm 
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cascaillou wrote:
brasil, but you say it's not stibnite nor jamesonite?

Exactly.
Now the most interesting part starts...
Any more guesses?

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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sat Sep 25, 2010 6:44 pm 
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and it's not rutile (not its sagenite variety), right?


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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sat Sep 25, 2010 9:26 pm 
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How about a starburst of iron compound - Citrine from Brazil... But, you did say that it can't be found in the photoatlas... So, alas, this is probably wrong. Still fun trying! :)


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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sun Sep 26, 2010 7:24 am 
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Asbesthos needles / Byssolithe?

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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sun Sep 26, 2010 11:00 am 
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actinolite needles in quartz
HUK

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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sun Sep 26, 2010 11:09 am 
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My last guess was going to be Actinolite too. Hopefully, Osman and I got it right this time!


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 Post subject: Re: Mysterious inclusions 2 (quite difficult one)
PostPosted: Sun Sep 26, 2010 9:02 pm 
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No, no, no!...
Thanks for all your guesses, but we haven' t got the right answer yet!
It's not such a common mineral as proposed ones.

Ok, two photos more of the same material and the last hint, if we still have no answer I'll say what's it soon.

Hint: The mineral is Ba, Ti, V and Cr oxide!

Image

Image

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