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Tessin habit quartz
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Scott LaBorde




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PostPosted: Dec 15, 2009 22:44    Post subject: Tessin habit quartz  

Since I live in an area that produces the tessin habit quartz I have become a huge fan of this habit. I was wondering if you have seen examples of single crystal double terminated tessin habit quartz crystals. I have seen poor examples where one termination is questionable or short and stubby. But I'm envisioning a long slender and tappering clear crystal (or clear smokey) terminating at both ends. I attached a photo of one of my personal finds for reference. I would love to see something like that on both ends of a single crystal.

I've yet see one for myself. Please direct me to picture, website, or reference in which I might see one for myself if possible. Else, post a picture here of one you might own. Thank you for any help.

Scott



tessin_habit.jpg
 Description:
Tessin habit quartz
Wake County, NC
 Viewed:  23373 Time(s)

tessin_habit.jpg


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Jason




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PostPosted: Dec 15, 2009 22:59    Post subject: Re: Tessin habit quartz  

Hey scott..fancy meeting you here..that was an excellent find you made in the Alpine type vein the other week..well done on that..one day i will make it up that way so save a few specs. for me...Please>>>
jason
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Scott LaBorde




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PostPosted: Dec 16, 2009 08:31    Post subject: Re: Tessin habit quartz  

Jason,

The invitation is always open. You could stay at my house if you wanted. I would take you to all the best spots I know. Just let me know when you want to do it.

Scott
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Peter




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PostPosted: Dec 16, 2009 09:04    Post subject: Re: Tessin habit quartz  

Tessiner habit is rather common also in pegmatites and pockets in the Volodarsk area (Volhyn Piezo quartz deposit) produced numerous crystals (also doubly teminated) see article in MR Nov-Dec 2009 as well as the Karelia Beryl Mine in Finland (in many respects remionding of Volodarsk). IN Finland dark smoky quartzes are usually only up to 0.5 m in length.
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Jordi Fabre
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PostPosted: Dec 16, 2009 09:47    Post subject: Re: Tessin habit quartz  

Just an appetizer. Here you have a Tessin habit Quartz from the duplicates of Folch collection. Isn't doubly terminated but its bottom is recrystallized.


Quartz Tessiner habitus Switzerland.jpg
 Description:
Quartz Tessin habit
Val Maggia, Canton Tessin, Switzerland
Specimen size: 5.3 × 2.8 × 2 cm.
Former duplicate of the Folch collection
Photo: Reference Specimens -> http://www.fabreminerals.com/specimens/RSFOL-folch-notable-specimens.php#RL26H7
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Quartz Tessiner habitus Switzerland.jpg



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Amir Akhavan




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PostPosted: Dec 16, 2009 10:31    Post subject: Re: Tessin habit quartz  

Yes, double terminated Tessin habit crystals occur, but they are rare.
I have seen a few small ones from the Dhading area in Nepal, but was stupid enough to think "I'll come back later" and when I came back they were all gone.

Cheers from Tokyo
Amir

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Scott LaBorde




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PostPosted: Dec 16, 2009 10:38    Post subject: Re: Tessin habit quartz  

Thank you Peter for your references. I will check into them.


tessin_habit_618.jpg
 Description:
I cheated and used my photo editor to create this image using the crystal I posted earlier. But, this is what I am looking for if it exists (of course without the slight distortion on the right side of the crystal).
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tessin_habit_618.jpg


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Scott LaBorde




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PostPosted: Dec 16, 2009 10:51    Post subject: Re: Tessin habit quartz  

Thank you Jordi for that excellent picture. The macromosaic structure, the sutures, the clarity, the striations, the shape, all are very appealing to me in these type crystals.
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jimB




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PostPosted: Dec 16, 2009 22:41    Post subject: Re: Tessin habit quartz  

Dear Scott,

I love how you think. Yes i too want to own that Tessin euhedron, twinned on the hypothetical "C" face and perfect beyond description.

..........grins.............

Your unphotoshopped crystal is magnificent. I have a very nice one from Hiddenite, large but not as fine and one collected in 1890s, same locality , same story.

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Peter Megaw
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PostPosted: Dec 16, 2009 22:50    Post subject: Re: Tessin habit quartz  

I think the possibility of another twin plane...along the "distortion" makes the photoshop job more interesting. Scary thing is that no matter how good nature gets, we can always on-up her in our minds. Fun thing is when nature trumps that!
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Scott LaBorde




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PostPosted: Dec 17, 2009 20:51    Post subject: Re: Tessin habit quartz  

Here are a couple more tessin habit crystals I found. We find the beautiful tessin habit smokey crystals and the rutile inclusions just like in the Hiddenite area of NC, yet we've yet to find any Hiddenite or Beryl in our area.


2.JPG
 Description:
Personally collected
Raleigh, NC
2.5 x 2 cm
 Viewed:  23110 Time(s)

2.JPG



3.JPG
 Description:
I put too much reflection on it but it was the best of many other failed attempts to photograph it correctly. (not that any of my photographs are done "correctly")

Personally collected
Cary, NC
8 x 3 cm
 Viewed:  23117 Time(s)

3.JPG



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Pete Richards
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PostPosted: Dec 17, 2009 22:10    Post subject: Re: Tessin habit quartz  

Scott,

Please contact me off-list by email; I'd like to explore some specimen comparing, trading and/or field trips. peterichards(at)oberlin(dot)net.

Thanks,
Pete

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Collecting and studying crystals with interesting habits, twinning, and epitaxy
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Scott LaBorde




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PostPosted: Dec 18, 2009 17:39    Post subject: Re: Tessin habit quartz  

Maybe transitional habit.


0.JPG
 Description:
PC* Raleigh, NC
goethite pseudomorph after siderite on quartz
3 x 1.5 cm
 Viewed:  23040 Time(s)

0.JPG



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Antonio Alcaide
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PostPosted: Dec 29, 2009 19:17    Post subject: Re: Tessin habit quartz  

Well, recently I have seen what I think it could be a biterminated tessin quartz. It is from Almuñecar, Granada, Spain (an alpine formation). I have several crystals featuring this habit, but only with one terminated point. I agree with you: the combination of tessin habit and biterminated crystal must be odd, weird.

I remembered having seen one or two. Exactly, I was right. A friend of mine has one strange crystal slightly thick in the middle with two terminations. I hope to post a photo in a couple of days. Most of those crystals are a bit smoky -from this locality-. They have striations and a complex structure.

I am going to upload a picture of a crystal of my own. The rest when the weather gets better.

Kind regards.



cuarzo almuñecar.jpg
 Description:
Tessin quartz. 4,5 x 2 cm . Almuñecar, Granada, Spain
 Viewed:  22921 Time(s)

cuarzo almuñecar.jpg



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PostPosted: Dec 29, 2009 20:35    Post subject: Re: Tessin habit quartz  

Thank you Antonio for your picture. I eagerly await the photo of the biterminated tessin habit crystal.


IMG_3491.JPG
 Description:
Here is a small display of crystals I found where I live in Wake County, NC
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IMG_3491.JPG



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vic rzonca




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PostPosted: Dec 29, 2009 22:26    Post subject: Re: Tessin habit quartz  

Tessin habit dark smokey from Spruce Hill area of NH.


IMG_1622.JPG
 Description:
5 cm., found Sep. 06
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IMG_1622.JPG


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PostPosted: Dec 30, 2009 02:02    Post subject: Re: Tessin habit quartz  

wrong topic for this thread scott, what about those Baryte and calcites you and bob found..got any pics of those?
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Scott LaBorde




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PostPosted: Dec 30, 2009 18:58    Post subject: Re: Tessin habit quartz  

amethystguy wrote:
wrong topic for this thread scott, what about those Baryte and calcites you and bob found..got any pics of those?


Posted the Baryte + calcite in the Macro/Micro thread -> http://www.mineral-forum.com/message-board/viewtopic.php?p=8854#8854

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PostPosted: Feb 16, 2010 10:12    Post subject: Re: Tessin habit quartz  

I found these this weekend. I was pretty happy. Although they appear attached, they were actually only attached via the clay between them and are separate crystals.


feb13-2010j.jpg
 Description:
It is such a joy to find and extract these crystals. They were covered in a layer of iron oxide, so once they have been cleaned in acid I will post more pictures. Also, although they appear smokey, they are actually rock crystal.
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feb13-2010j.jpg



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PostPosted: Feb 16, 2010 10:21    Post subject: Re: Tessin habit quartz  

Good job Scott! ;-)
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