Mindat Mineralogy Messageboard - Best Minerals F http://www.mindat.org/msgboard-72.html Fri, 24 May 2013 23:56:11 +0000 Phorum 5.2.15a http://www.mindat.org/forum.php?read,72,279143,292851#msg-292851 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,292851#msg-292851 I have sent an email to Bill Pinch who is listed on the label to see if we can get a copy of it for Mindat.]]> Rock Currier Best Minerals F Thu, 02 May 2013 11:44:09 +0000 http://www.mindat.org/forum.php?read,72,279143,292653#msg-292653 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,292653#msg-292653 The Fluor-dravite picture has no number. Google pictures: Fluor-dravite and it is the picture left to fluor-dravite label.
The labelled picture is not good.
Click the picture and you´ll get the iinformation.

Ilkka]]> Ilkka Mikkola Best Minerals F Tue, 30 Apr 2013 04:40:53 +0000 http://www.mindat.org/forum.php?read,72,279143,292600#msg-292600 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,292600#msg-292600 I can't find it. Do you have an image number for it?]]> Rock Currier Best Minerals F Mon, 29 Apr 2013 19:52:09 +0000 http://www.mindat.org/forum.php?read,72,279143,292522#msg-292522 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,292522#msg-292522 Ilkka Mikkola Best Minerals F Mon, 29 Apr 2013 06:59:13 +0000 http://www.mindat.org/forum.php?read,72,279143,292500#msg-292500 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,292500#msg-292500 Hmmm.... Yes, he may be right. Ill think about that. I'm sure that considering the complexity of the tourmaline group and how few analysis have been done, that there are many, many errors and ambiguous namings in the images we have here in our image bank on mindat.]]> Rock Currier Best Minerals F Sun, 28 Apr 2013 22:39:26 +0000 http://www.mindat.org/forum.php?read,72,279143,292446#msg-292446 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,292446#msg-292446 Ralph Bottrill Best Minerals F Sun, 28 Apr 2013 12:55:05 +0000 http://www.mindat.org/forum.php?read,72,279143,291988#msg-291988 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,291988#msg-291988 I don't understand your comment. Could you clarify?]]> Rock Currier Best Minerals F Tue, 23 Apr 2013 10:42:15 +0000 http://www.mindat.org/forum.php?read,72,279143,291940#msg-291940 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,291940#msg-291940 Uwe Kolitsch Best Minerals F Mon, 22 Apr 2013 13:39:06 +0000 http://www.mindat.org/forum.php?read,72,279143,291934#msg-291934 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,291934#msg-291934 if it's real suggests a possible term of dravite group or dravite-schorl serie]]> Ferdinando Giovine Best Minerals F Mon, 22 Apr 2013 12:29:12 +0000 http://www.mindat.org/forum.php?read,72,279143,291932#msg-291932 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,291932#msg-291932 Apparently the tourmalines near the contact with the country rocks were analyzed as being fluor-dravite. I have access to the abstract of:

Christine M. Clark, Frank C. Hawthorne, and Luisa Ottolini
FLUOR-DRAVITE, NAMG3AL6SI6O18(BO3)3(OH)3F, A NEW MINERAL SPECIES OF THE TOURMALINE GROUP FROM THE CRABTREE EMERALD MINE, MITCHELL COUNTY, NORTH CAROLINA: DESCRIPTION AND CRYSTAL STRUCTURE
Can Mineral 2011 49:57-62; doi:10.3749/canmin.49.1.57

but not the full article in which I hope to get my hands on and I hope it will tell what the big black tourmalines from the mine were. If they were definitely dravite, or schorl or some other tourmaline group mineral other than fluor-dravite, Ill deep six the schorl images in this article. Perhaps there will be a picture of real fluor-dravite in the article I can get permission to use in the best minerals article, although having it would, I imagine, be of rather limited instructive value.]]> Rock Currier Best Minerals F Mon, 22 Apr 2013 11:31:59 +0000 http://www.mindat.org/forum.php?read,72,279143,291929#msg-291929 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,291929#msg-291929
It's a little disconcerting having images of a mineral that may not be the mineral in question, but there again there are lots of guesses in Mindat photos! Hopefully this inspires someone to analyse the tourmalines in question.]]> Ralph Bottrill Best Minerals F Mon, 22 Apr 2013 11:21:46 +0000 http://www.mindat.org/forum.php?read,72,279143,291928#msg-291928 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,291928#msg-291928 You make a good point. Ill try and lay my hands on the article and make some sort of sense about what is going on. Yes, why indeed analyse garins when you can work on good crystals. Perhaps the article will tell is that they tested the big ones and that they were schorl or whatever.]]> Rock Currier Best Minerals F Mon, 22 Apr 2013 10:28:31 +0000 http://www.mindat.org/forum.php?read,72,279143,291917#msg-291917 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,291917#msg-291917 See: Clark, Christine et al 2011 Fluor-dravite..
Canadian Mineralogist Vol 49 no 1 p. 57-62
I have only the abstract, so I don´t know the details.

Ilkka]]> Ilkka Mikkola Best Minerals F Mon, 22 Apr 2013 06:31:55 +0000 http://www.mindat.org/forum.php?read,72,291911,291914#msg-291914 Re: Fluor-buergerite http://www.mindat.org/forum.php?read,72,291911,291914#msg-291914
To answer your question "How sure are you that these specimens from Mexico are really Fluor-buergerite?"

I myself am not sure at all. I'm not a scientist or have the scientific means to prove anything

I'm only saying that there is/was an article in existence that claims that (all?) Buergerite should actually be named Fluor-buergerite,

even when apparently "OH is dominant" (which is what the article actually says, according to Reiner Mielke).

The Buergerite page [www.mindat.org] (which now has been retitled to Fluor-buergerite) states that "Buergerite, i.e. the OH-dominant analogue, is currently not a recognised species."

The same page still has Mexquitic as the Type Locality (and the only locality for - now named - Fluor-buergerite in Mexico for that matter).

I'm only trying to be helpful here

Vik Vanrusselt


Vick,
Wow, an honest man. We are in the same boat in that I also don't have any of the modern analytical equipment, just some rudimentary tests, which are OK in a surprising number of cases, but certainly not this one. This change must have happened just recently since I started working on the Tourmaline group minerals. Now I get to go and change it all around. Sometimes I hate the IMA.
Rock]]> Rock Currier Best Minerals F Mon, 22 Apr 2013 03:15:06 +0000 http://www.mindat.org/forum.php?read,72,291911,291911#msg-291911 Fluor-buergerite http://www.mindat.org/forum.php?read,72,291911,291911#msg-291911 Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.



Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?



Fluor-buergerite: Trigonal
Na(Fe3+3)Al6(Si6O18)(BO3)3O3F

Fluor-buergerite, Mexquitic, San Luis Potosí, Mexico, Mexquiti.c 15cm wide© Rob Lavinsky

The Handbook of Mineralogy says crystals of buergerite (now fluor-buergerite are as large as 4cm. Mindat currently lists only four localities for thsi mineral. By far the most significant of these for crystal size and abundance of specimens on the market is the San Lous Potosí, Mexico. The species was named only in 1966 after Marten J. Buerger, professor of Mineralogy at the Massachusetts Institute of Technology. He invented the X-ray precession camera permitting undistorted photography of the reciprocal lattis. Good specimens of this mineral were fairly common back in the late 1960s and 1970s. Today you don't often see them offered for sale.


Fluor-buergerite
Mexico
San Luis Potosí, Mexquitic

Fluor-buergerite 2.6cm tall© 2001 John H. Betts
Fluor-buergerite 6.8cm tall© Rob Lavinsky

Fluor-buergerite 8cm wide© 2002 John H. Betts
Fluor-buergerite 8cm wide© Charles Creekmur

Fluor-buergerite ~5cm tall©
Fluor-buergerite 4cm tall© Rob Lavinsky

Fluor-buergerite 5.3cm tall© Rob Lavinsky
Fluor-buergerite 2.1cm tall© Rob Lavinsky

Fluor-buergerite ~20cm tall©
Fluor-buergerite 3.7cm wide © David J. Eicher
.
Fluor-buergerite ~17cm wide©


Fluor-buergerite
USA
South Dakota, Pennington Co., Oreville District

Fluor-buergerite, ~30cm wide©



Click here to view Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

1st Image selection for this article made on 15 December 2012]]> Rock Currier Best Minerals F Mon, 22 Apr 2013 02:59:05 +0000 http://www.mindat.org/forum.php?read,72,279143,291879#msg-291879 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,291879#msg-291879 Which locality are you talking about? I can't think you are talking about all pegmatites. When you are talking about grains at or near the contact I think you are talking about where the pegmatite contacts the host Rock? Do you know of any photos of fluor-dravite?]]> Rock Currier Best Minerals F Sun, 21 Apr 2013 17:38:59 +0000 http://www.mindat.org/forum.php?read,72,279143,291871#msg-291871 Re: Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,291871#msg-291871 zone are Fluor-dravites? Why analyse small grains instead of much bigger crystals?]]> Ilkka Mikkola Best Minerals F Sun, 21 Apr 2013 15:31:52 +0000 http://www.mindat.org/forum.php?read,72,279150,282455#msg-282455 Re: Foitite http://www.mindat.org/forum.php?read,72,279150,282455#msg-282455 www.mindat.org]]]> Ferdinando Giovine Best Minerals F Thu, 17 Jan 2013 17:17:17 +0000 http://www.mindat.org/forum.php?read,72,279150,279150#msg-279150 Foitite http://www.mindat.org/forum.php?read,72,279150,279150#msg-279150
©



Click here to view Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.


Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?



Foitite: Trigonal: A vacancy-dominant member of the Tourmaline Group.
Correct identification is only possible by suitable analytical methods.
(□,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OH


Foitite
China
Xinjiang Autonomous Region, Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture), Aletai Prefecture (Altay Prefecture), Fuyun Co. (Koktokay Co.), Koktokay pegmatite field (Keketuohai pegmatite field), Altay Mine

1cm tourmaline with foitite cap©



Foitite
Italy
Tuscany, Livorno Province, Elba Island, Campo nell'Elba, San Piero in Campo, Fonte del Prete

1cm Foitite xls on orthoclase©



Italy
Foitite
Tuscany, Livorno Province, Elba Island, Campo nell'Elba, San Piero in Campo, Rosina vein

8mm xl with Foitite cap© Matteo


Here is another example of a tourmaline with three different tourmaline species in the same crystal. The crystal above has a schorl base grading into elbaite with a fibrous foitite tip.


Foitite
Namibia
Erongo Region, Erongo Mountain

Foitite 5.3cm© Rob Lavinsky
Foitite, 6cm wide© Rob Lavinsky

Foitite/schorl 26cm wide© Weinrich Minerals, Inc.




Foitite
Namibia
Erongo Region, Karibib District, Davib East Farm 61 (Davib Ost Farm)

Foitite & quartz, 7.5cm wide© Verrier.Frédéric



Foitite
Spain
Madrid, El Berrueco, Los Taberneros Quarry (La Cabrera pluton)

Foitite on orthoclase ~2cm wide©



Foitite
USA
California, Riverside Co., Cahuilla District, Cahuilla, Little Cahuilla Mountain

Foitite ~13cm tall© Hapeman



Foitite
USA
Connecticut, Middlesex Co., Portland, Collins Hill, Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Strickland Quarry (Eureka Quarry)

Foitite with elbaite overgrowth 18cm wide© Albini



Foitite
USA
Maine, Oxford Co., Paris, Mount Mica Quarry

Foitite 1.9cm© Rob Lavinsky



Foitite
USA
Maine, Sagadahoc Co., Topsham, Fisher Quarry

Foitite 4.4cm© Lavinsky





Click here to view Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.]]> Rock Currier Best Minerals F Fri, 14 Dec 2012 11:41:12 +0000 http://www.mindat.org/forum.php?read,72,279149,279149#msg-279149 Fluor-schorl http://www.mindat.org/forum.php?read,72,279149,279149#msg-279149 Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.



Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?



Fluor-schorl: Trigonal: The F-analogue of schorl.
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3F

Fluor-Schorl ?, FOV 6mm, Lake Boga, Australia© Mills


Fluor-schorl is currently as from 11 localities on Mindat (23 April 2013. The type locality for fluor-schorl is Steinberg, Zschorlau, Schneeberg District, Erzgebirge, Saxony, Germany.


Fluor-schorl
Gemrnay
Saxony, Erzgebirge, Schneeberg District, Zschorlau, Steinberg. This is the type locality.

We have no images yet fluor-schorl from this locality.



Fluor-schorl
Australia
Victoria, Lake Boga, Lake Boga granite quarry

Fluor-Schorl ?, FOV 6mm© Judy Rowe
Fluor-schorl? FOV 6mm© Judy Rowe




Click here to view Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

First draft of the Best Minerals tourmaline group fluor-schorl was finished on 23 April 2013.]]> Rock Currier Best Minerals F Fri, 14 Dec 2012 11:39:20 +0000 http://www.mindat.org/forum.php?read,72,279148,279148#msg-279148 Fluor-feruvite http://www.mindat.org/forum.php?read,72,279148,279148#msg-279148 Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.


Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?


Fluor-feruvite: The hypothetical F-analogue of feruvite.
Ca(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3F

Fluor-feruvite is listed in Mindat's locality database from only one locality: Fort Hope pegmatite field, Fort Hope, Kenora District, Ontario, Canada. We have no images of this mineral and list it as the hypothetical fluorine analogue of feruvite.



Click here to view Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

The first draft of the gourmaline group member fluor-feruvite was finished on 12 April 2013.]]> Rock Currier Best Minerals F Fri, 14 Dec 2012 11:37:05 +0000 http://www.mindat.org/forum.php?read,72,279147,279147#msg-279147 Fluor-liddicoatite http://www.mindat.org/forum.php?read,72,279147,279147#msg-279147 Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.


Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?


Fluor-liddicoatite, Trigonal, the F-analogue of liddicoatite.
Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3F

Fluor-liddicoatite to 7.5cm Anjanabonoina pegs,Betafo District, Antananarivo Prov., Madagascar© E. Marini


Mindat currently lists eight localities (21 April 2013) for fluor-liddicoatite with Anjanabonoina pegmatites, Ambohimanambola Commune, Betafo District, Vakinankaratra Region, Antananarivo Province, Madagascar as the type locality. It is likely that as more tourmalines are analyzed more localities for this tourmaline variety will be discovered and the largest size know for crystals of fluor-liddicoatite will increase.



Fluor-liddicoatite
Madagascar
Antananarivo Province, Vakinankaratra Region, Betafo District, Ambohimanambola Commune, Anjanabonoina pegmatites

Fluor-liddicoatite, largest crystal is ~7cm tall© E. Marini


We have only one image of fluor-liddicoatite from this locality in our database and the duplicate image above will be replaced as others become available to us.


Fluor-liddicoatite
Norway
Nordland, Alstahaug, Sandnessjøen, Sandnessjøen Pegmatite

Fluor-liddicoatite, 1cm largest crystal© A. Michalsen


This is the only image of fluor-liddicoatite available to us from this locality at this time. Hopefully more will be added in the future.


Click here to view Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

[The Best Minerals tourmaline group species fluor-liddicoatite was finished on 21 April 2013]]]> Rock Currier Best Minerals F Fri, 14 Dec 2012 11:33:10 +0000 http://www.mindat.org/forum.php?read,72,279141,279146#msg-279146 Re: Feruvite http://www.mindat.org/forum.php?read,72,279141,279146#msg-279146 Rock Currier Best Minerals F Fri, 14 Dec 2012 11:32:18 +0000 http://www.mindat.org/forum.php?read,72,279141,279145#msg-279145 Re: Feruvite http://www.mindat.org/forum.php?read,72,279141,279145#msg-279145
Starting the tourmaline group is a bold move :)-D.

Olav]]> Olav Revheim Best Minerals F Fri, 14 Dec 2012 11:31:36 +0000 http://www.mindat.org/forum.php?read,72,279144,279144#msg-279144 Fluor-elbaite http://www.mindat.org/forum.php?read,72,279144,279144#msg-279144 Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.



Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?

Fluor-elbaite: Trigonal: The F-analogue of elbaite.
Na(Li 1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F

Fluor-elbaite, 1.7cm, Cruzeiro Mine, M.G. Brazil ©

Fluor-elbaite is listed from 14 localities on Mindat (20 April 2013). The Cruzeiro Mine Cruzeiro mine near São José da Safira, Doce valley, Minas Gerais, Brazil is the type locality for this species. Undoubtedly, many of the elbaite tourmalines are studied, many more localities for fluor-elbaite will be added.


Fluor-elbaite
Brazil
Minas Gerais, Doce valley, São José da Safira, Cruzeiro mine

Fluor-elbaite, up to 2.6cm tall ©
Fluor-elbaite ~2cm tall?© J.Ralph


The Cruzeiro mine is a large mine that has been operated for generations and has produced tens of thousands of tourmaline specimens. One wonders how many of them might be fluor-elbaite.


Fluor-Elbaite
Brazil
Minas Gerais, Jequitinhonha valley, Itinga, Taquaral, Piauí valley, Ponte do Piauí claim

Fluor-elbaite 4cm tall & apatite©




Click here to view Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

[First draft of the Best Minerals fluor-elbaite article was finished on 20 April 2013.]
]]> Rock Currier Best Minerals F Fri, 14 Dec 2012 11:30:01 +0000 http://www.mindat.org/forum.php?read,72,279143,279143#msg-279143 Fluor-dravite http://www.mindat.org/forum.php?read,72,279143,279143#msg-279143 Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?


Fluor-dravite: Trigonal: The F analogue of dravite.
Na(Mg3)Al6(Si6O18)(BO3)3(OH)3F

Fluor-Dravite/Quartz 3.5cm, Gouverneur, New York, USA© Chamberlain


Fluor-dravite is shown in Mindat's locality database as coming from only 7 localities (2013). However as more of the already know specimens from various localities for black and brown tourmalines are analysed, undoubtedly more localities will be added to those know for this species. The type locality for the mineral is the Crabtree Mine (Big Crabtree Emerald Mine), Spruce Pine, Spruce Pine District, Mitchell Co., North Carolina, USA.



Fluor-dravite
USA
North Carolina, Mitchell Co., Spruce Pine District, Spruce Pine, Crabtree Mine

Fluor-dravite a tourmaline group mineral, was described in the Canadian Mineralogist 2011 pages 57 to 62 from this locality. It occurs as isolated anhedral grains up to a few mm across at or near the boundary of a small body of granitic pegmatite with the surrounding country-rock, and is associated with plagioclase, K-feldspar, quartz, beryl, muscovite, garnet, biotite and fluorite. We currently have no image of fluor-dravite on mindat.No Images of specimens from this locality are in Mindat's database (May 2013)


Fluor-dravite
USA
New York, St. Lawrence Co., Gouverneur, Cream of the Valley Road

Fluor-dravite 4cm wide© Chamberlain
Fluor-dravite 5.5cm wide© Chamberlain

Fluor-dravite 6cm tall© Chamberlain
Fluor-dravite 7cm tall© Chamberlain


The xls occurred as prismatic pieces, about half of which were terminated on one end. I inferred from that that they were originally sticking out from the walls of the pocket and then got broken in half by subsequent tectonic activity. It was my suspicion that this very dark brown tourmaline wasn't either uvite or schorl, which is what the first collected material was labeled. I took it to Marian and it led to his work on the tourmalines of NYS. Every sample he examined is fluor-dravite. It's not close to the boundary. Moreover, a track across a xl cross-section revealed no zoning--it's all fluor-dravite. Two other minerals contain fluorine - fluorapatite and fluorine-rich tremolite which might actually be fluor-tremolite. Neither is present in much quantity, but the tourmaline is abundant. Most of the rest of the volume is microcline and quartz, neither of which would contain any fluorine.
[Steve Chamberlain 2013]


Click here to view Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

[First edition or fluor-dravite finished by Rock Currier 20 Abril 2013]]]> Rock Currier Best Minerals F Fri, 14 Dec 2012 11:28:07 +0000 http://www.mindat.org/forum.php?read,72,279141,279141#msg-279141 Feruvite http://www.mindat.org/forum.php?read,72,279141,279141#msg-279141
Click here to view Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.


Feruvite Trigonal: The Fe2+-analogue of uvite.
Ca(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)

Feruvite & Diaspore, 3.5cm wide, Kiura mine, Saeki city, Oita Pref., Kyushu Region, Japan© R. Tanaka


Mindat has only 14 localities listed for this mineral and thus far, only images of the species, both of which are below. It is likely that if many dravite tourmalines were tested, that a fair number of other feruvite localities would be found.


Feruvite
Japan
Kyushu Region, Oita prefecture, Saeki city, Kiura mine (Shin-Kiura mine; Kiura emery mine)

Feruvite on Margarite FOV 2.4cm© R. Tanaka

We need someone to tell us about the mine and the feruvite specimens that are found there.


Feruvite
New Zeland
North Island, Waikato, Repanga Island (Cuvier Island)

This is the type locality for feruvite. Mindat currently has no images of feruvite from this locality (2013)




Click here to view Best Minerals and here for Tourmaline group minerals, here for Chromium-dravite, here for Chromo-alumino-povondraite, here for Dravite, here for Elbaite, Afghanistan to Nigeria, here for Elbaite, Pakistan to Zambia here for Feruvite, here for Fluor Buergerite here for Fluor-dravite, here for Fluor-elbaite, here for Fluor-feruvite, here for Fluor-liddicoatite, here for Fluor-schorl, here for Foitite, here for Liddicoatite, here for Luinaite-(OH), here for Magnesiofoitite, here for Olenite, here for Oxy-dravite, here for Oxy-rossmanite, here for Oxy-schorl, here for Povondraite, here for Rossmanite, here for Schorl, here for Tsilaisite and here for Vanadium-dravite. Click here for Best Minerals T and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

[First draft finished 18 April 2013, Rock Currier]]]> Rock Currier Best Minerals F Fri, 14 Dec 2012 11:26:23 +0000 http://www.mindat.org/forum.php?read,72,153394,153394#msg-153394 Fulgurites http://www.mindat.org/forum.php?read,72,153394,153394#msg-153394 Best Minerals F and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.


It seems that your initial question of value and marketability has evolved into a question of it's correct identification.

Alfredo, posed the first logical question or request to you, asking if you would image a cross-section for others on the thread to observe and comment on, you did not provide this. Next, I asked if your specimen displayed any "hollow" features, your response was no. You also added, "I do know that not all fulgurites are hollow." (RED FLAG). Beyond these questions and remarks, nothing has transpired to progress the most important question ie, Are these actually fulgurites?

The only way this can be sorted out is by examination and analysis. Do all sand fulgurites have a hollow channel? The answer is most do. In formation the ground is heated to an average of approximately 2500 C. The core of this strike as it enters the ground may be much hotter. The hollow channel that is formed represents the area which was essentially vaporized. Beyond this "hollow channel" concentrically, "melting" is initiated, with temperatures of somewhere between 1400 and 1800 C (at least) required the melt the sand. Upon cooling, a glass is formed. Beyond this concentic zone of melting, the surrounding soils, sands, etc. may be partially melted and as a consequence and upon cooling will form a mixed assemblage with phases of glass and minerals, that will be otherwise "attached" or "cemented" for lack of a better word to the greater fulgurite structure. Also "branches" can and are often are produced during this process, all having a similar cross-sectional profile, all this happening in mere microseconds.

You asked, "If the beach where these were found is made up mostly of broken down shells, to the point of sand, wouldn't the fulgurite be mostly calcium carbonate as well?" The answer is no. Calcium carbonate would be reduced, the heat would drive off the carbon dioxide and you would be left with an oxide of calcium, CaO, which could be chemically measured in the the fulgurite glass but again NO carbonate would exist at all. Fulgurite glass generally will have between 90 and 99% SiO2. Depending on the the initial composition of the groundmass other oxides, ie. Al2O3, Fe2O3, CaO, etc will exist as well.

Phil said, "Almost all manufactured glass contains calcium carbonate. The main ingredients for glass are: silica sand, sodium carbonate and calcium carbonate.(Soda-lime-silica glass). The calcium carbonate does melt and forms glass in the presence of silicates." This is not accurate. As I stated, when heated to temperatures necessary to form fulgurites, the CaCO3 (calcium carbonate) is reduced, driving off CO2 gas and producing CaO, calcium oxide, only typically a minor component in ANY glass.

Conclusions There is seldom a circumstance where you can postively ID a specimen as a fulgurite from an image, especially when NO cross-section is displayed. Michael should have a small portion of his specimen cut and polished, demonstrating a cross-section. This would give him an idea as to it's validity. If it then appears to be a fulgurite, it should be analyzed to determine if it is a "glass" rather than a mineral assemblage. Testing a small piece in muriatic acid could not hurt as well. If it is a calcium carbonate mineral assemblage, it will be highly reactive, fizz and completely dissolve. If it is a fulgurite it will not dissolve, with the only reactivity occuring as possible "attached" carbonates react. Additionally, I agree with Ralph concerning the specimens from "Joshua Tree".

Final Comments Phil, I think Joshua Tree Museum is wonderful with a great purpose, best of luck with it's future success. Michael, you really owe it to yourself to have this tested if you believe in it. Try contacting a the Geology Dept of a university in your area, most would be happy to help and you would be able to get the facts on it. Good luck Michael.

All the Best,
Ron Gyllenhammer



Click here to view Best Minerals F and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.]]> Rock Currier Best Minerals F Mon, 28 Sep 2009 07:55:33 +0000 http://www.mindat.org/forum.php?read,72,139083,139083#msg-139083 Fluorarrojadite-(BaFe) http://www.mindat.org/forum.php?read,72,139083,139083#msg-139083 Best Minerals F and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.


Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?

Below are some preliminary notes I have made about Fluorarrojadite-(BaFe). This entry and thread has been made as a place holder for information that you will hopefully contribute about Fluorarrojadite-(BaFe). It should be in no way be thought of as a claim I have staked out to write about this mineral, and in fact is an invitation for someone to step forward and create the article about this mineral. If you are so inclined and have questions about the format that such an article should have, go the The welcome topic at the top of the Best Minerals forum and read what has been posted there. Also take a look at some of the more mature articles that have already been written like Rhodochrosite, Adamite, Millerite etc. You will need also to pick out other images of Fluorarrojadite-(BaFe)that will go into the article.



Fluorarrojadite-(BaFe)
{Ba[ ]}{Fe2+[ ]}{Ca}{Na2[ ]}{Fe2+13}{Al}[F2|HPO4|(PO4)11] Monoclinic

There appear to be no available images of Fluorarrojadite-(BaFe). Thus far it appears to be a one locality mineral.

Fluorarrojadite-(BaFe)
Morocco
Marrakech-Tensift-El Haouz Region, Marrakech Prefecture, Sidi Bou Kricha

We need someone to tell us about the Fluorarrojadite-(BaFe) specimens from this locality.



Click here to view Best Minerals F and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.]]> Rock Currier Best Minerals F Sun, 24 May 2009 21:21:39 +0000 http://www.mindat.org/forum.php?read,72,134378,134381#msg-134381 Re: Ferristrunzite http://www.mindat.org/forum.php?read,72,134378,134381#msg-134381 Rock Currier Best Minerals F Tue, 14 Apr 2009 08:53:45 +0000