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Hemimorphite
  
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Jordi Fabre
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PostPosted: Dec 19, 2009 16:48    Post subject: Hemimorphite  

Here -> https://www.mineral-forum.com/message-board/viewtopic.php?p=8647#8647 Peter Megaw wrote:
Maybe we should start a hemimorphite thread?...

Your desires are orders for me Peter! ;-)

Jordi



Hemimorphite Ojuela Mexico.jpg
 Description:
Hemimorphite with minor Mimetite
Mina Ojuela, Level 7, Mapimí, Municipio de Mapimí, Durango Mexico
Mined: 12/2004
Crystal size: 1.3 × 0.4 cm
Former T. L. Potucek collection
Photo: Reference Specimens -> http://www.fabreminerals.com/specimens/MEC-north-america-mineral-specimens.php#TM76L3
 Viewed:  36053 Time(s)

Hemimorphite Ojuela Mexico.jpg



Hemimorphite Santa Eulalia Mexico.jpg
 Description:
Hemimorphite
Santa Eulalia, Aquiles Serdán, Chihuahua Mexico
Crystal size: 2.9 × 0.7 cm
Photo: Reference Specimens -> http://www.fabreminerals.com/specimens/RSMEC-north-america-notable-specimens.php#TV66K0
 Viewed:  36077 Time(s)

Hemimorphite Santa Eulalia Mexico.jpg


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Gail




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PostPosted: Dec 19, 2009 17:15    Post subject: Re: Hemimorphite  

Gentlemen! I am ecstatic!
We are off to a party, but just ran over to take a few quick photos of some of my displayed pieces. What a treat to show the beauty of this incredible mineral.



DSC_0023.JPG
 Description:
I love the combination of milky and clear crystals.
 Viewed:  36052 Time(s)

DSC_0023.JPG



DSC_0022.JPG
 Description:
Splays of Hemimorphite.
 Viewed:  36048 Time(s)

DSC_0022.JPG



DSC_0020.JPG
 Description:
my "Poker chip" hemi. Sorry about the dark photo, but it shows off the growth patterns well.
 Viewed:  36024 Time(s)

DSC_0020.JPG


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Gail




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PostPosted: Dec 19, 2009 17:18    Post subject: Re: Hemimorphite  

And more..


DSC_0030.JPG
 Description:
my hemimorphite shelf from the side...
 Viewed:  36009 Time(s)

DSC_0030.JPG



DSC_0027.JPG
 Description:
 Viewed:  35977 Time(s)

DSC_0027.JPG



DSC_0026.JPG
 Description:
nice combo piece.
 Viewed:  35986 Time(s)

DSC_0026.JPG


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Gail




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PostPosted: Dec 19, 2009 17:21    Post subject: Re: Hemimorphite  

...


DSC_0225.JPG
 Description:
one of my favourites.
 Viewed:  36001 Time(s)

DSC_0225.JPG


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Carles Millan
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PostPosted: Dec 19, 2009 17:42    Post subject: Re: Hemimorphite  

And here some more...

Full descriptions available at https://www.mineral-forum.com/message-board/viewtopic.php?p=6450#6450 and https://www.mineral-forum.com/message-board/viewtopic.php?p=6310#6310 (these links may not work fine with some versions of Microsoft Internet Explorer due to an unsolved bug).



8250M-hemimorphite.jpg
 Description:
From Ojuelo mine, Mapimí. Photo Carles Millan.
 Viewed:  36078 Time(s)

8250M-hemimorphite.jpg



8250M-hemimorphite1.jpg
 Description:
From Ojuelo mine, Mapimí. Photo Carles Millan.
 Viewed:  36003 Time(s)

8250M-hemimorphite1.jpg



8286M-hemimorphite2.jpg
 Description:
From Santa Eulalia, Aquiles Serdán, Chihuahua. Photo Carles Millan
 Viewed:  36007 Time(s)

8286M-hemimorphite2.jpg



8286M-hemimorphite3.jpg
 Description:
From Santa Eulalia, Aquiles Serdán, Chihuahua. Photo Carles Millan
 Viewed:  36015 Time(s)

8286M-hemimorphite3.jpg



8286-hemimorphite1.jpg
 Description:
From Santa Eulalia, Aquiles Serdán, Chihuahua. Photo Fabre Minerals
 Viewed:  36027 Time(s)

8286-hemimorphite1.jpg


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Peter Megaw
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PostPosted: Dec 20, 2009 12:13    Post subject: Re: Hemimorphite  

Here are a few Mexican hemis from my collection.


hemimonster.jpg
 Description:
Monster Hemi crystals. Largest are 12 cm long. Oxide Zinc Orebody, Potosi Mine (see below for detailed info on this orebody)
 Viewed:  35901 Time(s)

hemimonster.jpg



HemiplattA.jpg
 Description:
4th Level San Antonio Mine, Santa Eulalia. Black specs are plattnerite and murdochite, some pieces from here have mimetite too. Large cabinet...hemi fan is 6 cm across
 Viewed:  35930 Time(s)

HemiplattA.jpg



hemixyz.jpg
 Description:
X-Y-Z "coordinates...these three 5 cm xals are at almost 90 degrees to each other
 Viewed:  35898 Time(s)

hemixyz.jpg



gemmyhemi.jpg
 Description:
Gemmy hemi...3.5 cm long
 Viewed:  35922 Time(s)

gemmyhemi.jpg



SE Hemi shelf.jpg
 Description:
Shelf of minerals from the Oxide Zinc Orebody, 13-16th Levels, Potosi Mine, Santa Eulalia. Minerals from here include hemimorphite, calcite, willemite, chalcophanite, adamite and cerussite. This orebody runs 35% zinc and is almost completely composed of supergene zinc minerals. The bright red, brown and white calcite twins you see from SE come from this orebody...as well as teh stalactites over hematite (often mislabeled cinnabar)
 Viewed:  35892 Time(s)

SE Hemi shelf.jpg



ojuelahemi1.jpg
 Description:
Ojuela Mine, cabinet specimen...12 cm across
 Viewed:  35889 Time(s)

ojuelahemi1.jpg



Hemi 005.jpg
 Description:
Hemimorphite. 12 cm across Bocoyna Mine, Cerro Las Minas, Guadalupe Victoria, Durango Mexico. Ex-Romero Collection. Note: workings from Bocoyna connect to the Santo Nino Mine, but the hemis come from sopes in Bocoyna
 Viewed:  35920 Time(s)

Hemi 005.jpg



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strahler




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PostPosted: Dec 20, 2009 17:01    Post subject: Re: Hemimorphite  

Peter,

When is the Mexico Min Rec with Santa Eulalia coming out, I heard you were leading the article?

Ryan Bowling

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PostPosted: Dec 20, 2009 17:03    Post subject: Re: Hemimorphite  

Here is my contribution.

I too like the clear and opaque crystal combinations.

Best Regards,

Ryan



rlb22.jpg
 Description:
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rlb22.jpg



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Peter Megaw
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PostPosted: Dec 20, 2009 18:04    Post subject: Re: Hemimorphite  

Did Wendell put you up to this...? This is a long-term work in progress, that I'd like to think I can finish this year...big subject to do justice to though
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PostPosted: Dec 20, 2009 20:00    Post subject: Re: Hemimorphite  

Peter,

No Wendell is not behind this one, just my interest on the topic. It is one district that I have always wanted to learn more about.

Take Care,

Ryan

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Peter Megaw
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PostPosted: Dec 21, 2009 02:28    Post subject: Re: Hemimorphite  

Ryan, I was kiddling, Wendell bugs me about this every time I see him. Funny, learning more about Santa Eulalia is still high on my list too...I think half the system remains to be found
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PostPosted: Dec 21, 2009 04:55    Post subject: Re: Hemimorphite  

Hi all,
Peter, what great hemis from Sta. Eulalia!! My contribution looks very humble in comparison but it is one of my favourite specimens and i have it since around 20 years.

Santa Eulalia, Aquiles Serdán, Chihuahua. Size approx 15 x 15 cm.

cheers
Roger



eulaliahemi-1a.jpg
 Description:
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eulaliahemi-1a.jpg


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PostPosted: Dec 21, 2009 11:10    Post subject: Re: Hemimorphite  

Hey, I love the SE material that is coming out of the woodwork! But I'm not surprised, during the 80s the Oxide Zinc orebody effectively kept the Potosi Mine alive...mining 400 tpw for shipment to a fume smelter in Monterrey. They mined by hand and the orebody was essentially one flat-lying pocket above another, separated by high grade Zn-Fe-Mn ore. Many of the pockets had calcite linings, but almost as many had hemi linings. Miguel Romero got the biggest crystal I ever saw from there...it was 25 cm long...and ugly because it was heavily included with Mn-gunk.

Similar bodies, that have never been touched exist throughout the upper parts of the West Camp (Buena Tierra and Potosi Mines) and the San Antonio Mine in the East Camp. I have been in caverns 50m wide, 100m tall and 400m long that were completely lined with a crust of hemimorphite 15 cm thick! (again, most was ugly). And let's not forget the zone where you get the white rhobohedral calcites overgrowing hemi...very similar material from both Santa Eulalia and Ojuela. Much is mistakenly sold as "chabazite" thanks to some long-ago mineral dealer who insisted that's what it was...and the error sticks.

I'll load some more shots of hemis from the 4th Level of the San Antonio mine...and elsewhere if I have them

For those who read German...or like cool old crystal drawings...the following is a classic study on Santa Eulalia hemi

Seebach, M. and Paul, F.P., 1912, Uber Kieselzinkerz von Santa Eulalia bei Chihuahua, Mexico; ein Beitrag zur Kenntnis der Krystallformen dieses Mineral: Zeitschrift fur Krystallographie und Mineralogie, bd. 51,h. 2, p. 148-206, 3 pls.



Kieselzinkerz2.jpg
 Description:
Plate from Seebach
 Viewed:  35631 Time(s)

Kieselzinkerz2.jpg



Kieselzinkerz.jpg
 Description:
Plate from Seebach
 Viewed:  35702 Time(s)

Kieselzinkerz.jpg



Hemi & Adamite.jpg
 Description:
Hemi and adamite, small minature, Oxide Zinc Orebody. There's a magnificent large piece from the same find figured in the Min Record "Freilich" issue. That lot was "stolen" from me...I had a handshake on the deal, another dealer showed up while I was waiting for the $ to be wired and offered three times what the guy had asked for the lot! Naturally, he got it...but the story has a happy ending. My source felt so bad about going back on his handhake that he sold me the next lot out of the pocket at his cost...and this turned out to be the best lot of purple adamites ever to come from Santa Eulalia!
 Viewed:  35615 Time(s)

Hemi & Adamite.jpg



hemiplatt1.jpg
 Description:
Minature, fan of hemi very heavily coated by plattnerite and murdochite. 4th Level San Antonio
 Viewed:  35660 Time(s)

hemiplatt1.jpg



hemiSASEbot.jpg
 Description:
Botryoidal hemimorphite: 12 cm across, 4th Level San Antonio Mine, light plattnerite dusting. Self collected 1985
 Viewed:  35637 Time(s)

hemiSASEbot.jpg



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PostPosted: Dec 21, 2009 14:04    Post subject: Re: Hemimorphite Ojuela...posted here though  

Here's a small hemi from Ojuela in my collection


OJUELA hemi web.jpg
 Description:
20 cm across
 Viewed:  35611 Time(s)

OJUELA hemi web.jpg



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PostPosted: Dec 21, 2009 14:09    Post subject: Re: Hemimorphite  

Peter, you must be very proud of your hemimorphites, they are absolutely superb! Please keep posting pictures of each single specimen, it is a pleasure to see this wonderful minerals.

Cheers!
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PostPosted: Dec 21, 2009 14:26    Post subject: Re: Hemimorphite  

Thank you for your kind words Tobias, i am pleased to have been fortunate enough to acquire these over the years...and what a great way to share them!

It's dusty here in Tucson, so am facing the daunting biannual job of removing all the specimens from their cases, dusting them off (compressed air works well) and reorganizing, redoing the display and retiring some things to drawers. This may be accompanied by some photo shooting, so perhaps there will be more to share soon.



chonita2.jpg
 Description:
Illustration from "Chonita" a story of the Mexican Mines. Unusual late 1800s missionary publication featuring a hard working boy and his mule whose livlihood is threatened by the avaricious gringo mine owners and lying co-workers. He is finally "rescued" by a Baptist missionary who he helps not knowing that God is on his side. SET IN SANTA EULALIA!!!
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chonita2.jpg



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PostPosted: Dec 21, 2009 22:24    Post subject: Re: Hemimorphite  

Peter,

A jaw dropping group of specimens!
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