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Collection of Joseph D'Oliveira
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Joseph DOliveira




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PostPosted: Aug 25, 2023 16:01    Post subject: Re: Collection of Joseph D'Oliveira  

A couple of small pieces added to my Canadian collection.


P1013833.JPG
 Mineral: Sphalerite
 Locality:
Sa Dena Hes Mine, Watson Lake, Watson Lake District, Yukon, British Columbia, Canada
 Dimensions: 5x3.5x2.6 cm's
 Description:
 Viewed:  4797 Time(s)

P1013833.JPG



Galena.jpg
 Mineral: Galena
 Locality:
Sa Dena Hes Mine, Watson Lake, Watson Lake District, Yukon, British Columbia, Canada
 Dimensions: 5.1x3x2.8 cm's
 Description:
 Viewed:  4797 Time(s)

Galena.jpg



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Joseph DOliveira




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PostPosted: Sep 18, 2023 16:30    Post subject: Re: Collection of Joseph D'Oliveira  

A nice combination specimen.


P1014057.JPG
 Mineral: Baryte
 Locality:
Moscona Mine, "Corte del Agua", El Llano, Solís, Corvera de Asturias, Comarca Avilés, Principality of Asturias (Asturias), Spain
 Dimensions: 10.5 x 9 x 5 cm's
 Description:
A nice specimen with barite and calcite on a calcite matrix covered by druzy fluorite.
 Viewed:  4671 Time(s)

P1014057.JPG



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Michael Shaw
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PostPosted: Sep 18, 2023 18:53    Post subject: Re: Collection of Joseph D'Oliveira  

Joseph DOliveira wrote:
A nice combination specimen.


Joseph, nice combination indeed. Very attractive specimen.
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Don Lum




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PostPosted: Sep 18, 2023 19:41    Post subject: Re: Collection of Joseph D'Oliveira  

Joseph, that really is a pretty specimen. Congratulations.
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Joseph DOliveira




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PostPosted: Sep 18, 2023 21:30    Post subject: Re: Collection of Joseph D'Oliveira  

Thanks Don and Michael, appreciated.
Joseph

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James Catmur
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PostPosted: Sep 19, 2023 07:56    Post subject: Re: Collection of Joseph D'Oliveira  

The blue Barytes from the Moscona are nice - there was a huge one in the Smithsonian which may well still be there
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Joseph DOliveira




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PostPosted: Apr 18, 2024 09:23    Post subject: Re: Collection of Joseph D'Oliveira  

A new addition to my collection.


P1014622A.JPG
 Mineral: Chrysocolla
 Locality:
L'Etoile du Congo Mine (Star of the Congo Mine), Lubumbashi (Elizabethville), Katanga Copper Crescent, Haut-Katanga (Shaba), Democratic Republic of the Congo (Zaire)
 Dimensions: 10 x 8.5 x 6 cm's
 Description:
Chrysocolla on botryoidal malachite.
 Viewed:  2323 Time(s)

P1014622A.JPG



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Joseph DOliveira




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PostPosted: Apr 25, 2024 19:17    Post subject: Re: Collection of Joseph D'Oliveira  

Recent addition.


P1014877.JPG
 Mineral: Dyscrasite with Löllingite
 Locality:
Bouismas Mine, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region, Morocco
 Dimensions: 6.3x4.4x6.5 cm's
 Description:
Beautiful combination specimen of Dyscrasite with Löllingite
 Viewed:  2188 Time(s)

P1014877.JPG



P1014885.JPG
 Mineral: Malachite
 Locality:
Bisbee, Warren District, Mule Mountains, Cochise County, Arizona, USA
 Dimensions: 7x5.3x1.5 cm's
 Description:
Botryoidal malachite with a velvet texture.
 Viewed:  2179 Time(s)

P1014885.JPG



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PostPosted: Apr 26, 2024 02:36    Post subject: Re: Collection of Joseph D'Oliveira  

Joseph DOliveira wrote:
Mineral: Acanthite
Locality: Bouismas Mine, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region, Morocco
Dimensions: 6.3x4.4x6.5 cm's
Description: Beautiful combination specimen of acanthite with silver.


I have never seen Acanthite from Bouismas. From the photo, it appears that the crystals are perhaps Silver, possibly coated by Arsenopyrite or Löllingite, but the main crystals do not seem to me to be Acanthite.
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Joseph DOliveira




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PostPosted: Apr 26, 2024 07:54    Post subject: Re: Collection of Joseph D'Oliveira  

Jordi Fabre wrote:
Joseph DOliveira wrote:
Mineral: Acanthite
Locality: Bouismas Mine, Agdz, Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region, Morocco
Dimensions: 6.3x4.4x6.5 cm's
Description: Beautiful combination specimen of acanthite with silver.


I have never seen Acanthite from Bouismas. From the photo, it appears that the crystals are perhaps Silver, possibly coated by Arsenopyrite or Löllingite, but the main crystals do not seem to me to be Acanthite.


I can only give the location as represented by the seller but I agree that the Imiter mine is more likely for this piece if it is acanthite. Having said that, I will be taking the specimen to our local university for analysis in the next few weeks and will post the results. As a Moroccan specimen, I would defer to your asessment and you can make whatever changes you feel necessary in the posting. I've just returned from Tucson and have been processing specimens for the last few weeks, I haven't had the time to to fully vet each one. My apologies for the misinformation.

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PostPosted: Apr 26, 2024 10:27    Post subject: Re: Collection of Joseph D'Oliveira  

No fault lies with you at all and If, as I suspect, it's a finely crystallized Silver, congratulations! it's much better than a 'common' Acanthite.

There's no doubt the piece is from Bouismas; the etched Calcite is very significant.
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Joseph DOliveira




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PostPosted: Apr 26, 2024 10:41    Post subject: Re: Collection of Joseph D'Oliveira  

Jordi Fabre wrote:
No fault lies with you at all and If, as I suspect, it's a finely crystallized Silver, congratulations! it's much better than a 'common' Acanthite.

There's no doubt the piece is from Bouismas; the etched Calcite is very significant.


Thank you Jordi, much appreciated. You can change the mineral name to silver if you wish, pending the final outcome.

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Done. Thanks.

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Joseph DOliveira




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PostPosted: Apr 27, 2024 20:28    Post subject: Re: Collection of Joseph D'Oliveira  

From one of my favorite localities.


P1015048A.JPG
 Mineral: Magnetite
 Locality:
Huanggang Mines, Hexigten Banner (Kčshíkčténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region, China
 Dimensions: 13x9x2.2 cm's
 Description:
Lustrous plate of magnetite crystals. The back of the specimen has areas with druzy, micro crystals of semi transparent, amber colored helvines.
 Viewed:  1882 Time(s)

P1015048A.JPG



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Joseph DOliveira




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PostPosted: Apr 30, 2024 11:44    Post subject: Re: Collection of Joseph D'Oliveira  

More of my recent additions.


P1015186.JPG
 Mineral: Chalcopyrite
 Locality:
Durango, Mexico
 Dimensions: 6.5x5.4x2 cm's
 Description:
Highly lustrous crystals on a matrix of druzy quartz crystals. This specimen is from the A. Parker collection in Arizona, unfortunately the exact locality was not detailed on the collection card.
 Viewed:  1654 Time(s)

P1015186.JPG



P1015195.JPG
 Mineral: Enargite
 Locality:
Longfellow Mine, Red Mountain District, San Juan County, Colorado, USA
 Dimensions: 7x5x2.4 cm's
 Description:
Lustrous black enargite crystals with minor calcite, also from the A. Parker collection in Arizona.
 Viewed:  1663 Time(s)

P1015195.JPG



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PostPosted: May 02, 2024 21:25    Post subject: Re: Collection of Joseph D'Oliveira  

An oddity that I purchased recently.


P1015312.JPG
 Mineral: Pyrite coated by Molybdenite
 Locality:
Rico Claims, Grayback District (Russell District), Costilla County, Colorado, USA
 Dimensions: 6.5x4.5x2.5 cm's
 Description:
I purchased this piece as an oddity with hopes of getting some clarification at a later date. It is a cluster of pyrite crystals with a silver coating of what is purported to be "bravoite" (FeNi)S2.There appears to be some controversy with the specimens from this particular locality and I haven't been able to fully determine if the coating is actually just a coating such as galena.
 Viewed:  1494 Time(s)

P1015312.JPG



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PostPosted: May 03, 2024 16:25    Post subject: Re: Collection of Joseph D'Oliveira  

Joseph DOliveira wrote:
It is a cluster of pyrite crystals with a silver coating of what is purported to be "bravoite" (FeNi)S2.There appears to be some controversy with the specimens from this particular locality...

Recommended reading: Specimens incorrectly labeled Bravoite coating Pyrite from Colorado
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PostPosted: May 03, 2024 17:34    Post subject: Re: Collection of Joseph D'Oliveira  

Thanks Jordi, it was an interesting thread. My specimen has significantly more silver coating on the pyrite than the one you had analyzed, I will try to get an analysis on my piece in the coming weeks.
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Joseph DOliveira




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PostPosted: May 05, 2024 11:04    Post subject: Re: Collection of Joseph D'Oliveira  

Thanks to my exposure to the FMF site, I have gained an interest in adding a few European minerals to my collection.


P1015445.JPG
 Mineral: Pyrite with Hematite
 Locality:
Elba Island, Livorno Province, Tuscany, Italy
 Dimensions: 6.5x6x4 cm's
 Description:
 Viewed:  1254 Time(s)

P1015445.JPG



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Joseph DOliveira




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PostPosted: May 19, 2024 08:08    Post subject: Re: Collection of Joseph D'Oliveira  

Joseph DOliveira wrote:
An oddity that I purchased recently.


Just wanted to update the information on this specimen. Through analysis, the coating on the pyrite crystals has been identified as molybdenite and not "bravoite". I have asked Jordi to update the original post to reflect the new information.



P1015312.JPG
 Mineral: Pyrite coated by Molybdenite
 Locality:
Rico Claims, Grayback District (Russell District), Costilla County, Colorado, USA
 Dimensions: 6.5x4.5x2.5 cm's
 Description:
 Viewed:  761 Time(s)

P1015312.JPG



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PostPosted: May 24, 2024 20:30    Post subject: Re: Collection of Joseph D'Oliveira  

Another specimen from the Huanggang Fe-Sn deposit.


P1015897.JPG
 Mineral: Magnetite
 Locality:
Huanggang Mines, Hexigten Banner (Kčshíkčténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region, China
 Dimensions: 6.3x4.5x3 cm's
 Description:
Lustrous plate of magnetite crystals. The back of the specimen has a small patch with druzy, micro crystals of semi transparent, amber colored helvines.
 Viewed:  556 Time(s)

P1015897.JPG



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