New Mineral Named After GIA’s John Koivula
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 Post subject: Mysterious inclusions
PostPosted: Tue Sep 14, 2010 5:59 pm 
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Ok, here is my quiz!
Just identify these black inclusions, the host mineral and the country of origin for this stone.

The prize - the honor to be the best !!! :D :D :D

At the morning:
Image

And the night view:
Image

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 Post subject: Re: Mysterious inclusions
PostPosted: Tue Sep 14, 2010 8:15 pm 
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:shock: Way cool whatever it is. Looking forward to the answers. :lol:

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 Post subject: Re: Mysterious inclusions
PostPosted: Tue Sep 14, 2010 9:42 pm 
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Sea urchins!

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 Post subject: Re: Mysterious inclusions
PostPosted: Tue Sep 14, 2010 10:40 pm 
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I've seen goethite inclusions in quartz that kinda look like this.....


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 Post subject: Re: Mysterious inclusions
PostPosted: Wed Sep 15, 2010 3:34 am 
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empress wrote:
Sea urchins!

Could be, but I don't like fossils. :D

Barbra Voltaire wrote:
I've seen goethite inclusions in quartz that kinda look like this.....

Ok, good shot! :smt063
You are right about the host mineral, but it's not goethite! [-X

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 Post subject: Re: Mysterious inclusions
PostPosted: Wed Sep 15, 2010 4:09 am 
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It could be hollandite in Madagascan Quartz... (Gubelin & Koivula Photoatlas vol. 2 page 610) or what the same authors describe as 'an unknown iron compound' in a citrine from Rio Grande do Sol, Brazil (same volume page 572)


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 Post subject: Re: Mysterious inclusions
PostPosted: Wed Sep 15, 2010 4:49 am 
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Antimony-giessenite in a quartz from Pakistan.

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 Post subject: Re: Mysterious inclusions
PostPosted: Wed Sep 15, 2010 6:39 am 
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Osman khattak wrote:
Antimony-giessenite in a quartz from Pakistan.

Nops! :(
Never have seen it. Is it similar to those inclusions?

Tim wrote:
It could be hollandite in Madagascan Quartz... (Gubelin & Koivula Photoatlas vol. 2 page 610)

Well, you just couldn't fail in a quiz with this mineral!
The next hint I was thinking to give is: "when you say it's name you see tulips, mills and red lights!..." But it wasn't necessary!

Well done Tim!!! =D> =D> =D>

The prize is for you! Image

It's hollandite in quartz from Madagascar. I cut it myself to see better these inclusions.

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 Post subject: Re: Mysterious inclusions
PostPosted: Wed Sep 15, 2010 6:54 am 
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=D> Congrats Tim! Well done Bro!

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 Post subject: Re: Mysterious inclusions
PostPosted: Wed Sep 15, 2010 7:41 am 
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Cool, Tim! That was impressive!

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 Post subject: Re: Mysterious inclusions
PostPosted: Wed Sep 15, 2010 8:31 am 
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Well done Tim
=D> =D>

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 Post subject: Re: Mysterious inclusions
PostPosted: Wed Sep 15, 2010 8:43 am 
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Dang! I only have Volume 1 of the Photoatlas and it wasn't in there :lol: .

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 Post subject: Re: Mysterious inclusions
PostPosted: Wed Sep 15, 2010 12:29 pm 
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=D> Not just a pretty face eh? :wink:

Hey MoDo, sounds like a good excuse to get anothery.

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 Post subject: Re: Mysterious inclusions
PostPosted: Wed Sep 15, 2010 4:20 pm 
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I need Volumes 2 and 3!! 8)

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