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Carles Millan
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Joined: 05 May 2007
Posts: 1297
Location: Catalonia
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Tobi
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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 Posted: Nov 02, 2019 03:40 Post subject: Re: Collection of Tobi |
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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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Tobi
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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| Posted: Nov 16, 2019 04:45 Post subject: Re: Collection of Tobi |
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New specimen - classic quartz/sulfide combination from Romania:
| Mineral: | Quartz, Chalcopyrite |
| Locality: | | Maramures, Romania |  |
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| 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 ) |
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1505 Time(s) |
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Tobi
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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| Posted: Nov 16, 2019 07:04 Post subject: Re: Collection of Tobi |
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New specimen - muscovite/aquamarine combination from Pakistan:
| Mineral: | Muscovite, Aquamarine |
| Locality: | | Chumar Bakhoor, Hunza Valley, Nagar District, Gilgit-Baltistan (Northern Areas), Pakistan | |
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| 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 ...) |
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1465 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1297
Location: Catalonia
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| Posted: Nov 16, 2019 08:12 Post subject: Re: Collection of Tobi |
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| 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
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4391
Location: Barcelona
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| Posted: Nov 16, 2019 08:19 Post subject: Re: Collection of Tobi |
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| Tobi wrote: |
(The specimen was labeled Herja, but I rather think it is from Cavnic )
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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
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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| Posted: Nov 17, 2019 05:09 Post subject: Re: Collection of Tobi |
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| 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:
| Mineral: | Aquamarine, Muscovite |
| Locality: | | Chumar Bakhoor, Hunza Valley, Nagar District, Gilgit-Baltistan (Northern Areas), Pakistan | |
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| Dimensions: | FOV 5 cm |
| Description: |
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1351 Time(s) |
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| Mineral: | Aquamarine, Muscovite |
| Locality: | | Chumar Bakhoor, Hunza Valley, Nagar District, Gilgit-Baltistan (Northern Areas), Pakistan | |
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| Dimensions: | FOV 5 cm |
| Description: |
| The parts of the upper photo are marked where you can see the "bottom" of the muscovites |
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1349 Time(s) |
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Tobi
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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| Posted: Nov 17, 2019 05:39 Post subject: Re: Collection of Tobi |
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| 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:
| Mineral: | Quartz, Chalcopyrite |
| Locality: | | Maramures, Romania | |
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| Dimensions: | Specimen size 12 cm, largest quartz 4 cm, largest chalcopyrite 2 cm |
| Description: |
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| Viewed: |
1345 Time(s) |
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jose luis jara jara
Joined: 18 Apr 2019
Posts: 71
Location: Fuenlabrada
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| Posted: Nov 17, 2019 12:30 Post subject: Re: Collection of Tobi |
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| A very crystalline aquamarine and magnificent quartz
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Tobi
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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| Posted: Nov 18, 2019 10:31 Post subject: Re: Collection of Tobi |
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| 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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Tobi
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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| Posted: Dec 01, 2019 09:45 Post subject: Re: Collection of Tobi |
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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:
| Mineral: | Azurite, Malachite, Chrysocolla |
| Locality: | | Morenci Mine, Morenci, Copper Mountain District, Shannon Mountains, Greenlee County, Arizona, USA | |
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| Dimensions: | Specimen size 19 cm |
| Description: |
| Azurite, Malachite, Chrysocolla, (Tenorite?) |
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1009 Time(s) |
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| Mineral: | Azurite, Malachite, Chrysocolla |
| Locality: | | Morenci Mine, Northwest Extension, Morenci, Copper Mountain District, Shannon Mountains, Greenlee County, Arizona, USA | |
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| 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? |
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1011 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 1478
Location: Oklahoma
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| Posted: Dec 01, 2019 12:50 Post subject: Re: Collection of Tobi |
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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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Tobi
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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| Posted: Dec 02, 2019 04:45 Post subject: Re: Collection of Tobi |
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| 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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Tobi
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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| Posted: Jan 11, 2020 06:02 Post subject: Re: Collection of Tobi |
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Fluorite and galena from England:
| Mineral: | Fluorite, Galena, Chalcopyrite |
| Locality: | | Blackdene Mine, Ireshopeburn, Weardale, North Pennines Orefield, County Durham, England, United Kingdom | |
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| Dimensions: | Specimen size 11,5 cm, fluorite crystal in the center 5 cm, galena crystals 2 cm |
| Description: |
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| Viewed: |
567 Time(s) |
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| Mineral: | Fluorite, Galena, Chalcopyrite |
| Locality: | | Blackdene Mine, Ireshopeburn, Weardale, North Pennines Orefield, County Durham, England, United Kingdom | |
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| Dimensions: | Specimen size 11,5 cm, main fluorite crystal 5 cm |
| Description: |
| Backside, small chalcopyrites attached to the fluorite |
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571 Time(s) |
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Tobi
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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| Posted: Jan 15, 2020 04:35 Post subject: Re: Collection of Tobi |
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Calcite from Tsumeb (I love this specimen, but it was a horror to take photos of it ...):
| Mineral: | Calcite |
| Locality: | | Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia | |
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| Dimensions: | Specimen size 11 cm, largest crystal 2,5 cm |
| Description: |
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| Viewed: |
466 Time(s) |
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 660
Location: Cambridge
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| Posted: Jan 15, 2020 07:24 Post subject: Re: Collection of Tobi |
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It would be hard to photograph - I love it too
| Tobi wrote: | | Calcite from Tsumeb (I love this specimen, but it was a horror to take photos of it ...): |
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jose luis jara jara
Joined: 18 Apr 2019
Posts: 71
Location: Fuenlabrada
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| Posted: Jan 15, 2020 08:13 Post subject: Re: Collection of Tobi |
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| Hi Tobi, that piece sure is Calcite, it sounds more like Dolomite
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Tobi
Joined: 07 Apr 2009
Posts: 3169
Location: Good Old Germany
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| Posted: Jan 15, 2020 11:02 Post subject: Re: Collection of Tobi |
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| James Catmur wrote: | | It would be hard to photograph - I love it too |
Thank you, James :-)
| jose luis jara jara wrote: | | Hi Tobi, that piece sure is Calcite, it sounds more like Dolomite |
I'm sorry, I don't know what you mean. This is a typical and distinctive Tsumeb calcite, what do you mean with "sounds like dolomite"?
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 660
Location: Cambridge
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| Posted: Jan 15, 2020 11:58 Post subject: Re: Collection of Tobi |
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I think he means 'looks like Dolomite'
| Tobi wrote: | | James Catmur wrote: | | It would be hard to photograph - I love it too |
Thank you, James :-)
| jose luis jara jara wrote: | | Hi Tobi, that piece sure is Calcite, it sounds more like Dolomite |
I'm sorry, I don't know what you mean. This is a typical and distinctive Tsumeb calcite, what do you mean with "sounds like dolomite"? |
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 660
Location: Cambridge
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| Posted: Jan 15, 2020 12:07 Post subject: Re: Collection of Tobi |
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A Spanish Dolomite (Eugui) for comparison
| Locality: | | Eugui, Esteríbar, Comarca Auñamendi, Navarre, Autonomous Community of Navarre, Spain | |
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| Dimensions: | 15 cm x 8 cm x 5 cm |
| Description: |
| Drawing by Barbara Stanley |
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| Viewed: |
369 Time(s) |
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