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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5025
Location: Barcelona
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 Posted: Jan 16, 2010 09:57 Post subject: Naica Mine - (11) |
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Past days grew here one very interesting thread related with Naica -> https://www.mineral-forum.com/message-board/viewtopic.php?t=892 , so maybe is the time to create a thread devoted to this exceptional mining area.
I start it with this classic combo Fluorite & Galena.
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Fluorite with Galena, Arsenopyrite and Calcite
Naica mining area, Saucillo, Chihuahua, Mexico
Mined about 1980
Specimen size: 7.7 × 5.5 × 4.1 cm.
Main crystal size: 3.5 × 2.9 cm.
Former Jan Buma collection. Number 020801
Photo: Reference Specimens -> http://www.fabreminerals.com/specimens/RSBUM-buma-notable-specimens.php#FD29H0 |
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89945 Time(s) |
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Antonio Alcaide
Site Admin
Joined: 23 Aug 2009
Posts: 314
Location: Spain
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| Posted: Jan 16, 2010 12:23 Post subject: Re: Naica Mine - (11) |
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Here you have my humble contribution.
Regards,
Antonio
Note of the coordinator of the forum:
Locality corrected by petition -> https://www.mineral-forum.com/message-board/viewtopic.php?p=9246#9246
Formerly attributed to Naica.
| Description: |
Gypsum (Var: Selenite)
Laguna del Rey in Coahuila, about 250km east of Naica.
13 x 11 cm (main crystal measuring 10 cm). From my personal collection |
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89866 Time(s) |
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Peter Megaw
Site Admin
Joined: 13 Jan 2007
Posts: 973
Location: Tucson, Arizona
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| Posted: Jan 16, 2010 12:27 Post subject: Re: Naica Mine - (11) |
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Nice example fo the recent greens with sulfide inclusions from the 520 Level orebody.
Here are some of the collector size gypsums
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| Exhibit in mine office with specimens in front of cross section through mine showing multiple chimneys |
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89861 Time(s) |
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| My candidate for the finest gypsum crystal to come out of Naica. This sits in an exhibit case in the mine office and is flawless |
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89917 Time(s) |
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Peter Megaw
Site Admin
Joined: 13 Jan 2007
Posts: 973
Location: Tucson, Arizona
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| Posted: Jan 16, 2010 12:28 Post subject: Re: Naica Mine - (11) |
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Antonio, nice piece, but it is not from Naica. These distinctive crystals come from Laguna del Rey in Coahuila, about 250km east of Naica.
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Turbo
Joined: 30 Sep 2009
Posts: 260
Location: Delaware
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| Posted: Jan 16, 2010 12:34 Post subject: Re: Naica Mine - (11) |
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A Single gypsum crystal with some matrix still attached and showing through from the base. This is one of the thick "parallelogram" type crystals.
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Gypsum var. selenite
Naica Mine, Naica, Municipio de Saucillo, Chihuahua, Mexico
14x7x6cm
Former Anthony Gricius collection |
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89802 Time(s) |
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Antonio Alcaide
Site Admin
Joined: 23 Aug 2009
Posts: 314
Location: Spain
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| Posted: Jan 16, 2010 12:45 Post subject: Re: Naica Mine - (11) |
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Thanks, Peter, for the correction. "Wrong american seller", I'm afraid. I'm going to change my label. I was a bit hesitant because I hadn't found those crystals on Mindat page about Naica (they don't appear on Coahuila page though, but your opinion is beyond all doubt for me).
Regards.
(Please, Jordi, correct the text or erase the post. Thanks a lot).
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Jesse Fisher
Joined: 18 Mar 2009
Posts: 639
Location: San Francisco
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| Posted: Jan 16, 2010 13:35 Post subject: Re: Naica Mine - (11) |
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A nice little cluster of spinel-twin fluorite, acquired at Tucson last year.
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| Spinel-twinned fluorite crystals, 3 cm across, Naica. |
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89820 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5025
Location: Barcelona
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Peter Megaw
Site Admin
Joined: 13 Jan 2007
Posts: 973
Location: Tucson, Arizona
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| Posted: Jan 16, 2010 17:42 Post subject: Re: Naica Mine - (11) |
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Jesse...check those fluorite crystals carefully...some have inclusions of curling and curving fibres of an elongate sulfosalt.
Speaking of sulfosalts...here's a cute little bournonite from Naica
and another fluorite
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| Bournonite, Naica with calcite and fluorite. These also grow on fluorite. 2 cm. |
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89842 Time(s) |
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| Description: |
| Fluorite, cubic with trisoctahedral modifications with earlier octahedral stage phantom deined by galena crystals. Naica Mine. Scovil photo |
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89789 Time(s) |
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Peter Megaw
Site Admin
Joined: 13 Jan 2007
Posts: 973
Location: Tucson, Arizona
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| Posted: Jan 16, 2010 17:43 Post subject: Re: Naica Mine - (11) |
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fluorite phantom is 7 cm across a face
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Carles Curto
Joined: 14 Sep 2006
Posts: 160
Location: Barcelona
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| Posted: Jan 18, 2010 10:19 Post subject: Re: Naica Mine - (11) |
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Similar to the Fabre's piece, this Fluorite was purchased to Natura Kucera (Barcelona) in 1986, and it was collected few months ago, probably the same year.
Fluorite crystals are slightly beveled by de dodecahedron and Galena crystals are twinned (spinel twin)
| Description: |
Fluorite
Gibraltar Mine, Naica, México.
5,5 x 6,8 x 4,9 cm
main crystal 3,7 x 3,7 x 4,1 cm |
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89619 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5025
Location: Barcelona
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| Posted: Jan 20, 2010 10:15 Post subject: Re: Naica Mine - (11) |
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A cute Gypsum from upper oxide levels of Naica Mine.
| Description: |
Gypsum
Upper oxide levels, Naica Mine, Naica, Municipio de Saucillo, Chihuahua, Mexico
Crystal size: 15 x 2 cm.
Former James Catmur collection
Photo: Joan Rosell |
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89673 Time(s) |
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| Description: |
| The same crystal standing up |
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89461 Time(s) |
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John S. White
Site Admin
Joined: 04 Sep 2006
Posts: 1298
Location: Stewartstown, Pennsylvania, USA
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| Posted: Jan 20, 2010 14:03 Post subject: Re: Naica Mine - (11) |
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Thank you Jordi for calling this gypsum and not selenite.
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John S. White
aka Rondinaire |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5025
Location: Barcelona
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| Posted: Jan 20, 2010 14:12 Post subject: Re: Naica Mine - (11) |
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| Gypsum is what it is, Master. ;-)
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Peter Megaw
Site Admin
Joined: 13 Jan 2007
Posts: 973
Location: Tucson, Arizona
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| Posted: Jan 21, 2010 02:34 Post subject: Re: Naica Mine - (11) |
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Yes, grasshopper, but it is the Naica Mine...not the Gibraltar
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89422 Time(s) |
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