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Collection of Tobi
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Carles Millan
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PostPosted: Nov 01, 2019 17:20    Post subject: Re: Collection of Tobi  

Tobi wrote:
New specimen - fluorite from Madagascar:

A splendid fluorite specimen, deep color, large size crystals and a very good aesthetic as a whole. Congratulations!

https://www.mineral-forum.com/message-board/viewtopic.php?p=68764#68764
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Tobi




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PostPosted: Nov 02, 2019 03:40    Post subject: Re: Collection of Tobi  

Carles Millan wrote:
Tobi wrote:
New specimen - fluorite from Madagascar:

A splendid fluorite specimen, deep color, large size crystals and a very good aesthetic as a whole. Congratulations!
https://www.mineral-forum.com/message-board/viewtopic.php?p=68764#68764
Thank you, Carles. I like that specimen a lot, its visual makes it a perfect center piece. Not all crystals on the edges of the specimen are complete, this is common in this locality, but all those parts are recrystallized so there is no visual damage. Some of the crystals even have phantoms inside - I really like that new Madagascar locality :-)

Regards
Tobi
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PostPosted: Nov 16, 2019 04:45    Post subject: Re: Collection of Tobi  

New specimen - classic quartz/sulfide combination from Romania:


CavnCHAL-Q.JPG
 Mineral: Quartz, Chalcopyrite
 Locality:
Maramures, Romania
 Dimensions: Specimen size 12 cm, largest quartz 4 cm, largest chalcopyrite 2 cm
 Description:
(The specimen was labeled Herja, but I rather think it is from Cavnic )
 Viewed:  744 Time(s)

CavnCHAL-Q.JPG


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Tobi




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PostPosted: Nov 16, 2019 07:04    Post subject: Re: Collection of Tobi  

New specimen - muscovite/aquamarine combination from Pakistan:


ChumAQUA.JPG
 Mineral: Muscovite, Aquamarine
 Locality:
Chumar Bakhoor, Hunza Valley, Nagar District, Gilgit-Baltistan (Northern Areas), Pakistan
 Dimensions: Specimen size 13 cm, beryl crystal 2,5 x 3 cm, largest muscovite 2,5 cm
 Description:
The upper part of the aquamarine is water-clear, you can see through the crystal how the muscovites are grown on it (I still fail to capture this on a good photo ...)
 Viewed:  708 Time(s)

ChumAQUA.JPG


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Carles Millan
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PostPosted: Nov 16, 2019 08:12    Post subject: Re: Collection of Tobi  

Tobi wrote:
New specimen - muscovite/aquamarine combination from Pakistan:

A very aesthetic specimen thanks to the additional faces in the upper part of the beryl and the surrounding mica crystals.
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Jordi Fabre
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PostPosted: Nov 16, 2019 08:19    Post subject: Re: Collection of Tobi  

Tobi wrote:

(The specimen was labeled Herja, but I rather think it is from Cavnic )


I agree that it looks as Cavnic but however it could also be from Herja (the "campanoid" form of the Quartz is indicative that it also could be Herja) so I changed the locality to "Maramures, Romania" just to be sure... 😏
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Tobi




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PostPosted: Nov 17, 2019 05:09    Post subject: Re: Collection of Tobi  

Carles Millan wrote:
Tobi wrote:
New specimen - muscovite/aquamarine combination from Pakistan:
A very aesthetic specimen thanks to the additional faces in the upper part of the beryl and the surrounding mica crystals.
Thank you, Carles, I like the specimen for the same reasons. The aqua crystal is neither large nor of intense colour, but it has this additional faces and the upper part is completely transparent, you can look through 2,5 cm of water-clear beryl and see the bottom of the muscovite crystals ...

Those of you who own world-class aqua specimens from Pakistan with free-standing 10 cm crystals of sky-blue colour may laugh at me that I mention this little and unspectacular detail, but I just love the clarity of the crystal ;-) Here are some closer photos of the part where you can see through the crystal:



IMG_3605.JPG
 Mineral: Aquamarine, Muscovite
 Locality:
Chumar Bakhoor, Hunza Valley, Nagar District, Gilgit-Baltistan (Northern Areas), Pakistan
 Dimensions: FOV 5 cm
 Description:
 Viewed:  596 Time(s)

IMG_3605.JPG



IMG_3605 - Kopie.JPG
 Mineral: Aquamarine, Muscovite
 Locality:
Chumar Bakhoor, Hunza Valley, Nagar District, Gilgit-Baltistan (Northern Areas), Pakistan
 Dimensions: FOV 5 cm
 Description:
The parts of the upper photo are marked where you can see the "bottom" of the muscovites
 Viewed:  594 Time(s)

IMG_3605 - Kopie.JPG


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Tobi




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PostPosted: Nov 17, 2019 05:39    Post subject: Re: Collection of Tobi  

Jordi Fabre wrote:
Tobi wrote:
(The specimen was labeled Herja, but I rather think it is from Cavnic)
I agree that it looks as Cavnic but however it could also be from Herja (the "campanoid" form of the Quartz is indicative that it also could be Herja) so I changed the locality to "Maramures, Romania" just to be sure... 😏
Thank you, Jordi, a good idea and definitely not a wrong locality information :-)
I think the photo above was ok but I tried a dark background, maybe better for this specimen:



dCavnCHAL-Q.JPG
 Mineral: Quartz, Chalcopyrite
 Locality:
Maramures, Romania
 Dimensions: Specimen size 12 cm, largest quartz 4 cm, largest chalcopyrite 2 cm
 Description:
 Viewed:  589 Time(s)

dCavnCHAL-Q.JPG


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jose luis jara jara




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PostPosted: Nov 17, 2019 12:30    Post subject: Re: Collection of Tobi  

A very crystalline aquamarine and magnificent quartz
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Tobi




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PostPosted: Nov 18, 2019 10:31    Post subject: Re: Collection of Tobi  

jose luis jara jara wrote:
A very crystalline aquamarine and magnificent quartz
Well, I would not call the quartz magnificent, it's just a 4 cm group of "ordinary" milky quartz from Cavnic, but nevertheless thanks, I'm glad you like the specimens :-)
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PostPosted: Dec 01, 2019 09:45    Post subject: Re: Collection of Tobi  

Actually I don't collect azurite or malachite or copper minerals at all ... but I could not resist the stunning colours on this classic specimen from Arizona:


MoreAZUR.JPG
 Mineral: Azurite, Malachite, Chrysocolla
 Locality:
Morenci Mine, Morenci, Copper Mountain District, Shannon Mountains, Greenlee County, Arizona, USA
 Dimensions: Specimen size 19 cm
 Description:
Azurite, Malachite, Chrysocolla, (Tenorite?)
 Viewed:  252 Time(s)

MoreAZUR.JPG



IMG_3633.JPG
 Mineral: Azurite, Malachite, Chrysocolla
 Locality:
Morenci Mine, Northwest Extension, Morenci, Copper Mountain District, Shannon Mountains, Greenlee County, Arizona, USA
 Dimensions: FOV 10 cm
 Description:
Azurite, Malachite, Chrysocolla, (Tenorite?)
Can anyone confirm that the dark grey spherules are tenorite?
And has anyone an idea about the pale material?
 Viewed:  254 Time(s)

IMG_3633.JPG


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Michael Shaw
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PostPosted: Dec 01, 2019 12:50    Post subject: Re: Collection of Tobi  

Hi Tobi,

A nice classic from Morenci - and large too! I am certainly not an expert on Morenci, but I think the most likely candidate for the dark botryoidal material is tenorite. The pale material is more puzzling, especially the way some of it is associated with the azurite. Could be very pale chrysocolla I suppose. Another possibility would be gibbsite.

Michael
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PostPosted: Dec 02, 2019 04:45    Post subject: Re: Collection of Tobi  

Thank you, Michael, both for your appreciation of the specimen and your hints concerning the analysis of the dark and the pale material!
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