| View previous topic :: View next topic |
| Author |
Message |
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
 Posted: Aug 19, 2020 13:45 Post subject: Re: Collection of Philippe Durand |
|
|
Eisenrose :) in the collection of my daughter.
| Mineral: | Hematite |
| Locality: | | Les Courtes, Bassin du Talèfre, Mont Blanc Massif, Chamonix, Haute-Savoie, Auvergne-Rhône-Alpes, France |  |
|
| Dimensions: | 30mm*20mm*20mm |
| Description: |
| collected by JF Astier the first days of August |
|
| Viewed: |
12866 Time(s) |
|
| Mineral: | Hematite |
| Locality: | | Les Courtes, Bassin du Talèfre, Mont Blanc Massif, Chamonix, Haute-Savoie, Auvergne-Rhône-Alpes, France | |
|
| Dimensions: | 30mm * 20mm *20mm |
| Description: |
| close up of the same specimen |
|
| Viewed: |
12855 Time(s) |
|
| Mineral: | Hematite |
| Locality: | | Les Courtes, Bassin du Talèfre, Mont Blanc Massif, Chamonix, Haute-Savoie, Auvergne-Rhône-Alpes, France | |
|
| Dimensions: | 30mm * 20mm * 20mm |
| Description: |
|
| Viewed: |
12876 Time(s) |
|
_________________
https://www.youtube.com/user/ptitrainrouge/videos?view_as=subscriber |
|
| Back to top |
|
 |
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
|
| Back to top |
|
|
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
| Posted: Oct 24, 2020 07:37 Post subject: Re: Collection of Philippe Durand |
|
|
:)
| Mineral: | Quartz (variety smoky) and Hematite |
| Locality: | | Les Droites (south face), Mont Blanc Massif, Chamonix, Haute-Savoie, Auvergne-Rhône-Alpes, France | |
|
| Dimensions: | 7,5cm x 7cm x 4cm |
| Description: |
| double terminated crystals with platy hematite micro crystals, collected in early August 2020 on the south face of Les Droites peak, at 3700m by the cristallier JF Astier |
|
| Viewed: |
12598 Time(s) |
|
_________________
https://www.youtube.com/user/ptitrainrouge/videos?view_as=subscriber |
|
| Back to top |
|
|
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
| Posted: Oct 30, 2020 06:18 Post subject: Re: Collection of Philippe Durand |
|
|
:)
| Mineral: | Hematite and Fluorite |
| Locality: | | Les Droites (south face), Mont Blanc Massif, Chamonix, Haute-Savoie, Auvergne-Rhône-Alpes, France | |
|
| Dimensions: | 60mm x 55mm *35 mm |
| Description: |
| Collected early days of August 2020 by the cristallier J F Astier. The octahedral light purple fluorite crystals are up to 2mm ; a not so common association |
|
| Viewed: |
12531 Time(s) |
|
_________________
https://www.youtube.com/user/ptitrainrouge/videos?view_as=subscriber |
|
| Back to top |
|
|
Sante Celiberti
Joined: 04 Oct 2019
Posts: 699
Location: Tuscany
|
| Posted: Oct 30, 2020 07:09 Post subject: Re: Collection of Philippe Durand |
|
|
Hi,Philippe.
Congratulations on this fresh collected specimen.
Indeed very unusual one, at least from the Alps.
As an Alpines collector, I like it very much.
Stay healthy.
Sante
|
|
| Back to top |
|
|
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
|
| Back to top |
|
|
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
| Posted: Nov 06, 2020 07:00 Post subject: Re: Collection of Philippe Durand |
|
|
:)
| Mineral: | Hematite |
| Locality: | | Les Droites (south face), Mont Blanc Massif, Chamonix, Haute-Savoie, Auvergne-Rhône-Alpes, France | |
|
| Dimensions: | 95mm x 65mm x 45mm |
| Description: |
|
| Viewed: |
12403 Time(s) |
|
_________________
https://www.youtube.com/user/ptitrainrouge/videos?view_as=subscriber |
|
| Back to top |
|
|
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
| Posted: Nov 28, 2020 06:20 Post subject: Re: Collection of Philippe Durand |
|
|
:)
| Mineral: | Hematite |
| Locality: | | Fibbia, Fontana, Central St Gotthard Massif, Leventina, Ticino (Tessin), Switzerland | |
|
| Dimensions: | 80mm x 80mm x 40mm |
| Description: |
|
| Viewed: |
12159 Time(s) |
|
_________________
https://www.youtube.com/user/ptitrainrouge/videos?view_as=subscriber |
|
| Back to top |
|
|
Sante Celiberti
Joined: 04 Oct 2019
Posts: 699
Location: Tuscany
|
| Posted: Nov 28, 2020 06:23 Post subject: Re: Collection of Philippe Durand |
|
|
WOW!!!
Congratulations, Philippe. :-)
|
|
| Back to top |
|
|
Volkmar Stingl
Joined: 23 Sep 2012
Posts: 838
Location: Innsbruck
|
| Posted: Nov 28, 2020 11:30 Post subject: Re: Collection of Philippe Durand |
|
|
| Wonderful hematite specimen! Is this self-collected?
|
|
| Back to top |
|
|
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
| Posted: Nov 29, 2020 02:05 Post subject: Re: Collection of Philippe Durand |
|
|
thank you Volkmar and Sante
No it is not self collected . I would love that it was.
But I am afraid that this location is really far over my lock in range :(
.
| Description: |
|
| Viewed: |
12077 Time(s) |
|
_________________
https://www.youtube.com/user/ptitrainrouge/videos?view_as=subscriber |
|
| Back to top |
|
|
Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4102
Location: Germany
|
| Posted: Nov 29, 2020 07:09 Post subject: Re: Collection of Philippe Durand |
|
|
| Really wonderful Fibbia specimen, Philippe!
|
|
| Back to top |
|
|
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
|
| Back to top |
|
|
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
|
| Back to top |
|
|
Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4893
Location: Barcelona
|
| Posted: Apr 03, 2021 14:06 Post subject: Not Hematite but Magnetite and not from Nador |
|
|
| Philippe Durand wrote: |
Mineral: Hematite
Locality: Nador, Nador Province, Oriental Region, Morocco
Dimensions: 90mm x 75mm x 60 mm
|
These strange 'Hematites' in fact are Magnetite and them are from the Zgounder Mine located on Jebel Siroua, Taroudant Province, Souss-Massa Region.
Already changed it in the captions of the image of the Philippe Duran.
| Mineral: | Hematite |
| Locality: | | Nador, Nador Province, Oriental Region, Morocco | |
|
| Dimensions: | 6.7 × 4.9 × 0.5 cm |
| Description: |
| This is one of the classic Hematites from a small prospect located very close to the Nador city |
|
| Viewed: |
10821 Time(s) |
|
| Mineral: | Magnetite |
| Locality: | | Zgounder Mine, Jebel Siroua, Taroudant Province, Souss-Massa Region, Morocco | |
|
| Dimensions: | 5.8 × 4.6 × 4.7 cm |
| Description: |
| And this is another of these peculiar Magnetites from the Zgounder Mine |
|
| Viewed: |
10808 Time(s) |
|
| Mineral: | Magnetite |
| Locality: | | Zgounder Mine, Jebel Siroua, Taroudant Province, Souss-Massa Region, Morocco | |
|
| Dimensions: | Crystals of about 0.7 x 0.7 cm |
| Description: |
|
| Viewed: |
10810 Time(s) |
|
|
|
| Back to top |
|
|
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
| Posted: Apr 04, 2021 02:08 Post subject: Re: Collection of Philippe Durand |
|
|
Thank you for correcting Jordi :)
But are you absolutely sure ?
It seems to me a bit strange, as the seller is, as you are a recognized specialist of Morocco, and he makes a lot of purchase trips here, and I do not see any reason for him to change from magnetite to hematite....
And can magnetite crystallize as hexagonal plates ?
On my specimen, under magnification, there are two layers of material: one as hexagonal shiny black plates, and then more grey anhedral material over the black plates, that yes could be magnetite.
Could we have magnetite over hematite, or any replacement ?
_________________
https://www.youtube.com/user/ptitrainrouge/videos?view_as=subscriber |
|
| Back to top |
|
|
Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4893
Location: Barcelona
|
| Posted: Apr 04, 2021 04:25 Post subject: Re: Collection of Philippe Durand |
|
|
| Philippe Durand wrote: |
But are you absolutely sure ?
|
Yes
|
|
| Back to top |
|
|
Bob Morgan
Joined: 18 Jan 2018
Posts: 228
Location: Savannah, Georgia
|
| Posted: Apr 04, 2021 17:54 Post subject: Re: Collection of Philippe Durand |
|
|
Magnetite can have six sided faces that are dodecahedral faces bound on four sides by other dodecahedral faces and on two by octahedral faces. But stacked plates are really strange. Toward the top they resemble 'spearhead' marcasite twins, but the angle is different from marcasite twins. Is there some twinning involved?
The reticular looking magnetites are just as strange. Some appear to have rectangular faces which necessitates cube faces, which are quite rare for magnetite. Can particular faces be examined and their forms discerned? How about the angles of their change in direction?
Thanks for another mystery to keep our imaginations alive and life interesting.
|
|
| Back to top |
|
|
Bob Morgan
Joined: 18 Jan 2018
Posts: 228
Location: Savannah, Georgia
|
| Posted: Apr 04, 2021 18:36 Post subject: Re: Collection of Philippe Durand |
|
|
On second look the platy crystals toward the top of the photo are in parallel or near parallel alignment, not showing twinning like 'spearhead marcasites. There appears to be some dissolution and maybe redeposition to produce the steps.
The hexagonal appearance could also be due to spinel contact twinning. Magnetite does form in such hexagonal plates. if so these steps might be polysynthetic.
Kostov in Crystal Habits of Minerals writes of platy magnetite and conditions that seem to make for that habit, but I'm not sure anything he mentions would apply to this.
|
|
| Back to top |
|
|
Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
|
|
| Back to top |
|
|
|
FAQ 
Register
Log in
Forgotten your password?
