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Calcite Forms - (4)
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Jordi Fabre
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PostPosted: Apr 09, 2010 08:27    Post subject: Re: Calcite Forms - (4)  

Welcome to FMF Am!

Nice Calcite, by the way...

Jordi
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Tracy




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PostPosted: Apr 09, 2010 09:40    Post subject: Re: Calcite Forms - (4)  

Jordi, I have a "goblet" calcite crystal like yours (but of course not nearly as beautiful) with the only locality information being China. Were these crystals found in multiple localities, or can I use the locality info you provided with your crystal and apply it to mine?

Paul, your calcite" faden" looks like a cousin to my own calcite "feather" (for that's what it makes me think of) which I posted in my collection thread, and shown again below.

- Tracy



Calcite tube3.jpg
 Description:
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Calcite tube3.jpg



Calcite tube2.jpg
 Description:
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Calcite tube2.jpg



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Jordi Fabre
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PostPosted: Apr 09, 2010 10:35    Post subject: Re: Calcite Forms - (4)  

Tracy wrote:
...Were these crystals found in multiple localities, or can I use the locality info you provided with your crystal and apply it to mine?

Wenshan is the name of the city around which three mines seems supply these Calcites (170 km. around, according Berthold Ottens China's book). The name of these three mines are: Laochang, Dulong and Dayakou, and as fas as I know is not clear from which of them these Calcites appears. That's why I use Wenshan, just like a mining area name.
Other people use also Malipo or Gejiu, names of two other main villages close Wenshan.

As far as I know, no other mines in China supply currently these kind of "goblet" Calcites, but China is still very complicated in terms of minerals localities, so please take all this info as a probability, not as a secure datum ;-)

Jordi
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Paul Bordovsky




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PostPosted: Apr 09, 2010 11:01    Post subject: Re: Calcite Forms - (4)  

Nice calcite, Tracy. The specimens do look like they were neighbors, at one time. I saw that
the chinese dealer in Tucson still had multiple specimens of these available this year.
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PostPosted: Apr 09, 2010 11:03    Post subject: Re: Calcite Forms - (4)  

Duly noted Jordi, I will make note of the uncertainties. Thanks!

- Tracy

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PostPosted: Apr 09, 2010 11:10    Post subject: Re: Calcite Forms - (4)  

And thanks Paul, didn't see your comment till after you posted.

- Tracy

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PostPosted: Apr 09, 2010 11:17    Post subject: Re: Calcite Forms - (4)  

Here is a specimen from Karnes county, Texas. This is part of a concretion from a uranium mine.


47karnescal.jpg
 Description:
Specimen is 6cm. tall. From the Wright-McCrady mine in the Karnes Uranium District.
 Viewed:  22857 Time(s)

47karnescal.jpg


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Carles Millan
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PostPosted: Apr 09, 2010 16:26    Post subject: Re: Calcite Forms - (4)  

This might well be a calcite pseudomorph after andradite, but it is not. Its surprising rhombododecahedral habit is indeed typical of garnets.

Overall size: 70 mm x 40 mm x 35 mm. Major crystal size: 35 mm across.

From Berry Materials Corp quarry, North Vernon Plant, NE edge of North Vernon, Jennings Co., Indiana, USA.



5454M-calcite2.jpg
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5454M-calcite2.jpg



5454M-calcite3.jpg
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5454M-calcite3.jpg



5454M-calcite4.jpg
 Description:
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5454M-calcite4.jpg


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Tobi




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PostPosted: Apr 10, 2010 02:45    Post subject: Re: Calcite Forms - (4)  

A fine calcite, Carles, the pseudo-garnet crystal shape is very interesting (and very nice, too).

And Paul, that 17 cm specimen from China is really a stunning piece, very beautiful!
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PostPosted: Apr 10, 2010 09:25    Post subject: Re: Calcite Forms - (4)  

Let's try this as a funky calcite from La Sirena Mine. Acquired in Guanajuato on May 31, 1995. It is 7.5 x 7.0 x 3.5 cm.


Calcite La Sirena Guanajuato.JPG
 Description:
Calcite, Mina La Sirena, Guanajuato, Guanajuato, Mexico
7.5 x 7.0 x 3.5 cm
1995
 Viewed:  22704 Time(s)

Calcite La Sirena Guanajuato.JPG


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PostPosted: Apr 13, 2010 07:42    Post subject: Re: Calcite Forms - (4)  

I love this thread!

Gail, when your outstanding Calcites? ;-)



Calcite - Santa Eulalia Mexico.jpg
 Description:
Complex equidimensional crystals, very rich in faces, growing on an early generation of smaller crystals primarily covering a stalactitic growth. In other words = a natural sculpture, isn't? ;-)
Mina El Potosí, Santa Eulalia, Aquiles Serdán, Chihuahua, Mexico
Mined about 1994
Former James Catmur collection
Specimen size: 14 × 10 × 3.5 cm.
Main crystal size: 2.3 × 2.2 cm.
 Viewed:  22638 Time(s)

Calcite - Santa Eulalia Mexico.jpg



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Gerhard Niklasch




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PostPosted: Apr 14, 2010 13:56    Post subject: Re: Calcite Forms - (4)  

While we're awaiting Gail's marvels... how about a little in-between snack?

I'm afraid I don't have any hexagonal calcites to show, and I do not even know how to describe the shapes below better than calling them complicated. The group is attached to the side of a little mountainscape of lustrous black Hausmannite from the N'Chwaning II Mine, Kuruman, N.Cape, SA which came into my possession in June 2009 (collection id 09ZAHc001, overall specimen size 36x25x17mm).

At the time, I wasn't quite sure about the decorations being calcite, so I was looking for a visible proof of birefringence. Most of the many faces are frosted and several of the smooth faces are obstructed, but in one direction it is possible to look through a crystal onto what's beyond. So I positioned the tip of a wooden toothpick there. All four pictures are crossed-eyes stereo pairs taken through the microscope (with halogen lighting and white LED fill-in).



09ZAHc001zz.jpg
 Description:
Calcite group from "above", field of view 13.6x16.2mm.
 Viewed:  22570 Time(s)

09ZAHc001zz.jpg



09ZAHc001zy.jpg
 Description:
Calcite group from the side, field of view 7.7x11.4mm.
 Viewed:  22602 Time(s)

09ZAHc001zy.jpg



09ZAHc001zx.jpg
 Description:
Birefringence demo, field of view 5.6x8.3mm.
 Viewed:  22549 Time(s)

09ZAHc001zx.jpg



09ZAHc001zw.jpg
 Description:
Birefringence demo (magnified yet more), FOV 3.9x3.8mm.
 Viewed:  22576 Time(s)

09ZAHc001zw.jpg


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PostPosted: Apr 15, 2010 07:37    Post subject: Re: Calcite Forms - (4)  

One more from Wenshan area (Yunnan, China)


Calcite Wenshan China.jpg
 Description:
Crystals well defined, richly endowed with multiple faces. The specimen has been published in the book ‘China’, by Berthold Ottens, on page 479.
Wenshan area, Yunnan, China
Mined in 2003
Specimen size: 7 × 5 × 5 cm.
Main crystal size: 1.9 × 1.4 cm.
Minor fluorescence long & short UV
Photo: Reference Specimens -> http://www.fabreminerals.com/specimens/RSCN-china-notable-specimens.php#MR86E0
 Viewed:  22537 Time(s)

Calcite Wenshan China.jpg


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PostPosted: Apr 26, 2010 12:48    Post subject: Re: Calcite Forms - (4)  

And, of course, one of the luminous Calcites from Rudny


Calcite Rudny Kazakhstan.jpg
 Description:
Calcite
Rudny Altai, Kostanai Oblast, Kazakhstan
Specimen size: 4.7 × 3.6 × 3 cm.
Former Jan Buma collection. Number 921203
Photo -> http://www.fabreminerals.com/specimens/RSFSU-former-soviet-union-notable-specimens.php#EM66D5
 Viewed:  22444 Time(s)

Calcite Rudny Kazakhstan.jpg



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PostPosted: Apr 27, 2010 04:49    Post subject: Re: Calcite Forms - (4)  

Another of my favorite calcite specimens with a few quartz crystals.


MFCalcite.jpg
 Description:
The specimen is 8 x 5.5 x 5 cm. Roncari quarry (Tilcon quarry), East Granby, Hartford Co., Connecticut, USA
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MFCalcite.jpg


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PostPosted: Apr 29, 2010 07:27    Post subject: Re: Calcite Forms - (4)  

A curiosity from Spain.
Let’s see: some scalenohedrons of Calcite once existed in the pocket. They are now long gone and all that remains is the form of the faces of the old Calcite crystals that have been preserved by the coating of Quartz that formed on them.



Quartz after Calcite La Viesca Asturias Spain.jpg
 Description:
Quartz after Calcite
Reguerín 2 pocket, La Viesca, La Collada, Asturias, Spain
Mined on December 2001
Specimen size: 11.5 × 9.5 × 5 cm.
Photo: Reference Specimen -> http://www.fabreminerals.com/specimens/RSSFL-spanish-fluorite-notable-specimens.php#NM61D9
 Viewed:  22277 Time(s)

Quartz after Calcite La Viesca Asturias Spain.jpg



Quartz after Calcite La Viesca Asturias Spain rear.jpg
 Description:
Rear of the specimen (a floater)
 Viewed:  22275 Time(s)

Quartz after Calcite La Viesca Asturias Spain rear.jpg


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PostPosted: Apr 29, 2010 20:42    Post subject: Re: Calcite Forms - (4)  

Here is a different view of the calcite forms, under UV light.


concretion.jpg
 Description:
Concretion from the Karnes Uranium district. Red fluorescence is scalenohedral form of calcite, thin pink wisps are veins of rhombohedral calcite, and the green fluorescing areas are chalcedony. Shortwave UV.
 Viewed:  22257 Time(s)

concretion.jpg



School and Fluorescent 019a.jpg
 Description:
Calcite from Terlingua, Texas, with two generations of growth. The blue areas have bright phosphorescence. This is under shortwave UV. I call this specimen "starry night", and it is about 14 cm.
 Viewed:  22266 Time(s)

School and Fluorescent 019a.jpg



terlingua2type (Large).jpg
 Description:
Terlingua type calcite from Mexico. This is shown under shortwave UV and has great phosphorescence..
 Viewed:  22236 Time(s)

terlingua2type (Large).jpg



terlinguatype.jpg
 Description:
Same specimen (Terlingua type calcite from Mexico) under longwave UV.
 Viewed:  22265 Time(s)

terlinguatype.jpg


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PostPosted: May 02, 2010 00:41    Post subject: Re: Calcite Forms - (4)  

Hi folks. Thought I would add a calcite here from my collection. Calcite, dolomite, and marcasite from a location probably better known for its quartz.


Calcite-HansenQuarry-StJohnsvilleNY.jpg
 Description:
Calcite, dolomite, marcasite - Hansen Quarry, St. Johnsville, NY
 Viewed:  22184 Time(s)

Calcite-HansenQuarry-StJohnsvilleNY.jpg



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PostPosted: May 02, 2010 09:23    Post subject: Re: Calcite Forms - (4)  

Uncommon habit in a calcite specimen from Tonglushan Copper Mine, Daye, Huangshi, Hubei, China.
Main crystal size: 53 mm x 36 mm x 27 mm.



5458M-calcite7.jpg
 Description:
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5458M-calcite7.jpg



5458M-calcite6.jpg
 Description:
 Viewed:  22161 Time(s)

5458M-calcite6.jpg



5458M-calcite5.jpg
 Description:
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5458M-calcite5.jpg


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PostPosted: May 03, 2010 02:19    Post subject: Re: Calcite Forms - (4)  

Calcite and Dolomite. Pine Point, Northwest Territories, Canada. Circa 2000.


Calcite.jpg
 Description:
Calcite, Dolomite. 6x4x3 cm.
 Viewed:  22116 Time(s)

Calcite.jpg


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