We use cookies to show content based on your preferences. If you continue to browse you accept their use and installation. More information. >

FMF - Friends of Minerals Forum, discussion and message board
The place to share your mineralogical experiences


Spanish message board






Newest topics and users posts
31 Oct-12:39:30 Re: collection of michael shaw (Michael Shaw)
31 Oct-05:34:05 Re: munich show (mineralientage) 2024 (James Catmur)
30 Oct-14:07:27 Re: introduction with some pictures (Philippe Durand)
30 Oct-11:47:09 Re: contribution dr. Menor-salván - bertrandite from portuguese pegmatites - (51) (Fmf Forum)
30 Oct-11:46:20 Contribution dr. Menor-salván - bertrandite from portuguese pegmatites - (51) (Fmf Forum)
30 Oct-09:41:36 Re: munich show (mineralientage) 2024 (James Catmur)
30 Oct-09:36:03 Re: introduction with some pictures (James Catmur)
30 Oct-08:50:48 Re: introduction with some pictures (Michael Shaw)
30 Oct-05:58:51 Introduction with some pictures (Pegmatiteappreciator)
29 Oct-23:45:34 My 44th visit to the mineralientage in munich since 1977 (Roger Warin)
29 Oct-09:20:39 Collection of carles millan: fluorite from erongo (Carles Millan)
29 Oct-03:57:49 Re: is this a gold ore??? (Vdhinesh79)
29 Oct-00:04:37 Re: collection of volkmar stingl (Volkmar Stingl)
28 Oct-12:12:31 Re: is this a gold ore??? (Vdhinesh79)
28 Oct-12:10:40 Re: is this a gold ore??? (Jordi Fabre)
28 Oct-12:07:43 Re: is this a gold ore??? (Matt_zukowski)
28 Oct-11:55:16 Re: is this a gold ore??? (Lluis)
28 Oct-10:22:03 Re: is this a gold ore??? (Vdhinesh79)
28 Oct-06:27:20 Re: is this a gold ore??? (James Catmur)
28 Oct-06:01:21 Re: is this a gold ore??? (Vdhinesh79)
28 Oct-04:28:43 Re: the mim museum in beirut, lebanon (Mim Museum)
28 Oct-03:29:52 Re: is this a gold ore??? (Vdhinesh79)
28 Oct-02:35:31 Re: is this a gold ore??? (Alfredo)
27 Oct-17:09:16 What might this be? (Todd Willis)
27 Oct-16:38:02 Re: sphalerite from kulmberg austria (Jordi Fabre)

For lists of newest topics and postings click here


RSS RSS

View unanswered posts

Why and how to register

Index Index
 FAQFAQ RegisterRegister  Log inLog in
 {Forgotten your password?}Forgotten your password?  

Like
115978


The time now is Oct 31, 2024 18:32

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
The information provided within this Forum about localities is only given to allow reference to them. Any visit to any of the localities requires you to obtain full permission and relevant information prior to your visit. FMF is strictly against any illicit activities related to collecting minerals.
Austinites from Mapimí?
  
  Index -> Incorrect classification and fakes
Like


View previous topic :: View next topic  
Author Message

Carles Curto




Joined: 14 Sep 2006
Posts: 160
Location: Barcelona


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 05, 2008 14:20    Post subject: Austinites from Mapimí?  

Jordi, in the report of Sainte-Maie-aux-Mines at the forum, comments the eclosion on the market of several samples of Austinite from Mapimí. I reed the Austinite had been analized by Peter Megaw, then I really believe they are Austinite. But… they are surprisingly similar, in matrix, presentation, color and crystalline morphology (I had some samples from Jordi in my hands), to some Adamites (cuproadamites) reported by Mineralogical Record, vol. 34(5) of 2003 (Mexico special issue II), page 40, photos 47 and 49, and coincide with a sample I acquired in Barcelona to Natura Kucera in the year 1989 and also with some pictures from MINDAT. From the text of Mineralogical Record I cannot deduce that those Adamites (cuproadamites) were analized. Then may be the samples of the eighteens need a revision?


8-adam-89-04-1f-pe.jpg
 Description:
Adamite (cuproadamite) purchased in 1989
 Viewed:  21190 Time(s)

8-adam-89-04-1f-pe.jpg


Back to top
Reply to topic Reply with quote
Like
   

Gail




Joined: 21 Feb 2008
Posts: 5839
Location: Texas, Lone Star State.


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 05, 2008 16:40    Post subject: Re: Austinites from Mapimí?  

I looked it over this morning and had a similar thought about this sample too Carles.
How funny that you would voice this today.

_________________
Minerals you say? Why yes, I'll take a dozen or so...
Back to top
Reply to topic Reply with quote
Like
   

Jordi Fabre
Overall coordinator of the Forum



Joined: 07 Aug 2006
Posts: 4929
Location: Barcelona


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 05, 2008 17:59    Post subject: Re: Austinites from Mapimí?  

Still more funny: yesterday I got my own analysis of the Austinite? and the result was not Austinite but cuprian Adamite!

After careful talks with my analyzer and Peter Megaw the conclusion is that on this pocket it should be two different species: colorful bluish-greenish cuprian Adamite with very shiny crystals and very sharp faces and edges, and also Austinite with crusts of green crystals and somewhat elongate chisel tipped crystals.

Peter Megaw said to me:

"The austinites we've examined include botryoidal masses, crusts of green crystals, and somewhat elongate chisel tipped crystals. Some of the blockier "pseudo-octahedral" crystals in your pictures look more like cuprian adamite. We've analyzed as many as we have because we've been going back and forth on this stuff for several years...its almost as if alternating pockets are one or the other. I've seen some pockets with 2 or 3 distinct habits of the same species.
If the pseudo-octahedral stuff IS cuprian adamite it has great color and luster."

So, for me and after both analysis, two different species were mined on this pocket, so in order to clarify the news that I wrote concerning the new Austinite, I already corrected my texts about Ste. Marie Show:
https://www.mineral-forum.com/message-board/viewtopic.php?t=268

Jordi



Cuprian Adamite Mapimí.jpg
 Description:
Colorful bluish-greenish cuprian Adamite from Mina Ojuela, Mapimí, Mexico with very shiny crystals and very sharp faces and edges.
 Viewed:  21425 Time(s)

Cuprian Adamite Mapimí.jpg


Back to top
Reply to topic Reply with quote
Like
   

Carles Curto




Joined: 14 Sep 2006
Posts: 160
Location: Barcelona


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 06, 2008 02:20    Post subject: Re: Austinites from Mapimí?  

¡All seems to be clear! I add another picture of cuprian Adamite, also purchased in 1989, that has different characteristics and proceeds from a find of 1988 in the site called “Luga Número Nueve" (lugar Number Nine) on Ojuela mine. Those samples show more clearly isolated crystals of more blue shades.


8-adam-89-04-2f-pe.jpg
 Description:
main crystal: 1,3 x 0,7 x 0,4 cm.
 Viewed:  21119 Time(s)

8-adam-89-04-2f-pe.jpg


Back to top
Reply to topic Reply with quote
Like
   

Jordi Fabre
Overall coordinator of the Forum



Joined: 07 Aug 2006
Posts: 4929
Location: Barcelona


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 06, 2008 05:12    Post subject: Re: Austinites from Mapimí?  

A copy of the analysis of the cuprian Adamite. Note the absence of Calcium, so it can't be Austinite.

Jordi



Cuprian Adamite analysis.jpg
 Description:
Result of the analysis of one specimen of the new material from Ojuela Mine. On this case: cuprian Adamite.
 Viewed:  21100 Time(s)

Cuprian Adamite analysis.jpg


Back to top
Reply to topic Reply with quote
Like
   

marvsT/Nminerals




Joined: 06 Nov 2008
Posts: 68
Location: Juda, Wisconsin

View user's profile

Send private message

PostPosted: Nov 06, 2008 13:03    Post subject: Re: Austinites from Mapimí?  

Question: In the photo, 8-adam-89-04-2f-pe.jpg, what is the associated brown mineral? Thanks, Marv
_________________
Member: Badger Lapidary and Geological Society
Great things can be found in small packages!
Back to top
Reply to topic Reply with quote
Like
   

Les Presmyk




Joined: 06 Dec 2007
Posts: 372
Location: Gilbert, AZ

View user's profile

Send private message

PostPosted: Nov 07, 2008 09:47    Post subject: Re: Austinites from Mapimí?  

The brown mineral is calcite on iron oxide matrix.
Back to top
Reply to topic Reply with quote
Like
   
Display posts from previous:   
   Index -> Incorrect classification and fakes   All times are GMT - 5 Hours
Page 1 of 1
    

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


All pictures, text, design © Forum FMF 2006-2024


Powered by FMF