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Tobi
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Joined: 07 Apr 2009
Posts: 4248
Location: 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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| Viewed: |
21967 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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21965 Time(s) |
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Michael Shaw
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Joined: 30 Apr 2008
Posts: 2250
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
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: 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
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: 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: |
21545 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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| Viewed: |
21555 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: 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: |
21419 Time(s) |
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James Catmur
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Joined: 14 Sep 2006
Posts: 1477
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: 118
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
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: 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
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Joined: 14 Sep 2006
Posts: 1477
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: 1477
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, Chartered Community of Navarre (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: |
21118 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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| Posted: Jan 15, 2020 12:34 Post subject: Re: Collection of Tobi |
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| I know these Spanish dolomites and yes, they look a litle bit similar ... but I also think my specimen looks first of all like a Tsumeb calcite ;-)
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5071
Location: Barcelona
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| Posted: Jan 15, 2020 13:11 Post subject: Re: Collection of Tobi |
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| Tobi wrote: | | I know these Spanish dolomites and yes, they look a litle bit similar ... but I also think my specimen looks first of all like a Tsumeb calcite ;-) |
Calcite Tobi, you be right... 😏
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jose luis jara jara
Joined: 18 Apr 2019
Posts: 118
Location: Fuenlabrada
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| Posted: Jan 15, 2020 15:12 Post subject: Re: Collection of Tobi |
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| 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"? |
Tobi, I just wanted to comment that the piece looked like Dolomite
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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| Posted: Jan 16, 2020 03:52 Post subject: Re: Collection of Tobi |
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| jose luis jara jara wrote: | | Tobi, I just wanted to comment that the piece looked like Dolomite |
Ok Jose, now I understand ;-) And yes, there's some similarity, many carbonate minerals appear in such a shape (calcite, dolomite, ankerite, rhodochrosite, siderite).
By the way, what the photo doesn't show: The calcite is not colourless but pale light-pink, I think this is caused by hematite.
Regards
Tobi
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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| Posted: Apr 13, 2020 06:05 Post subject: Re: Collection of Tobi |
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Fluorite from England - new find from a classic locality:
| Mineral: | Fluorite |
| Locality: | | Greenlaws Mine, Daddry Shield, Weardale, North Pennines Orefield, County Durham, England / United Kingdom | |
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| Dimensions: | Specimen size 18 cm, largest crystal 8 cm |
| Description: |
| original photo © Günther Gerndt |
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| Viewed: |
21026 Time(s) |
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