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The collection of Pierre and Riana Joubert
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Pierre Joubert




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PostPosted: Dec 05, 2013 03:21    Post subject: Re: The collection of Pierre and Riana Joubert  

The last 2 specimens (1230522 jpg; 1240107 jpg) are no longer in our collection as a good friend showed an interest in them.
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PostPosted: Dec 05, 2013 04:38    Post subject: Re: The collection of Pierre and Riana Joubert  

Pierre

That is what good (mineral) friends are for!

Thank you for the photos and regular news - I will try to remember to add a photo of Ceres, Scotland to your thread so that people can see the difference in landscape and temperature (I shall be there over the Xmas season and I sure the temperature difference will be clear even in a photo)

James
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PostPosted: Dec 05, 2013 05:01    Post subject: Re: The collection of Pierre and Riana Joubert  

James wrote:
Pierre

That is what good (mineral) friends are for!

Thank you for the photos and regular news - I will try to remember to add a photo of Ceres, Scotland to your thread so that people can see the difference in landscape and temperature (I shall be there over the Xmas season and I sure the temperature difference will be clear even in a photo)

James

Hi James. It is an absolute pleasure to be a part of this forum. Thanks to you and others who make this possible. There seems to be a number of places across the world with the name Ceres. Please add a photo of Ceres, Scotland. Needless to say, should you ever visit Ceres, SA, you are welcome to our home.

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PostPosted: Dec 11, 2013 12:52    Post subject: Re: The collection of Pierre and Riana Joubert  

Here are two specimens; Hyalite opal on smoky Quartz and a Quartz group. The fiirst we bought at a small town near Erongo some 6 years ago and the second, we bought at Pella, Orange river a few months ago.


P1250002.JPG
 Description:
Opal (variety hyalite) on smoky quartz.
Erongo mountains; Namibia
60 x 42 x 24 mm
The hyalite opal (32 x 22 mm) has an even better colour in person, very much like jelly.
 Viewed:  22400 Time(s)

P1250002.JPG



P1250005.JPG
 Description:
Opal (variety hyalite) on smoky quartz.
Erongo mountains; Namibia
60 x 42 x 24 mm
 Viewed:  22423 Time(s)

P1250005.JPG



P1250013.JPG
 Description:
Smoky Quartz
Erongo mountains; Namibia
F.O.V. 27 mm
This is the back side of the Hyalite specimen above.
 Viewed:  22405 Time(s)

P1250013.JPG



P1250272.JPG
 Description:
Quartz with hematite
Pella, Orange river, Northern Cape, SA
42 x 29 x 18 mm
 Viewed:  22413 Time(s)

P1250272.JPG



P1250284.JPG
 Description:
Quartz with hematite
Pella, Orange river, Northern Cape, SA
42 x 29 x 18 mm
Same as above.
 Viewed:  22337 Time(s)

P1250284.JPG



P1250289.JPG
 Description:
Quartz with hematite
Pella, Orange river, Northern Cape, SA
42 x 29 x 18 mm
Same as above.
 Viewed:  22390 Time(s)

P1250289.JPG



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PostPosted: May 12, 2014 07:29    Post subject: Re: The collection of Pierre and Riana Joubert  

We have added some specimens to our collection, mostly from 2 localities nl. Brandberg and Mount Malosa. The ugly marks on my thumb is voting ink.


P1300850.JPG
 Description:
Aegerine and feldspar
Mount Malosa, Zomba, Malawi.
68 x 52 x 27 mm
 Viewed:  21973 Time(s)

P1300850.JPG



P1300855.JPG
 Description:
Aegerine and feldspar
Mount Malosa, Zomba, Malawi.
68 x 52 x 27 mm
Same as above.
 Viewed:  21938 Time(s)

P1300855.JPG



P1300857.JPG
 Description:
Aegerine and feldspar
Mount Malosa, Zomba, Malawi.
68 x 52 x 27 mm
Same as above.
 Viewed:  22001 Time(s)

P1300857.JPG



P1280054.JPG
 Description:
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
57 x 49 x 41 mm
 Viewed:  21984 Time(s)

P1280054.JPG



P1280231.JPG
 Description:
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
57 x 49 x 41 mm
Same as above.
 Viewed:  21999 Time(s)

P1280231.JPG



P1280235.JPG
 Description:
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
57 x 49 x 41 mm
Same as above.
 Viewed:  21990 Time(s)

P1280235.JPG



P1300981.JPG
 Description:
Quartz variety smoky and aegirine
Mount Malosa, Zomba, Malawi
51 x 43 x 39 mm
 Viewed:  21937 Time(s)

P1300981.JPG



P1300985.JPG
 Description:
Quartz variety smoky and aegirine
Mount Malosa, Zomba, Malawi
51 x 43 x 39 mm
Same as above.
 Viewed:  21941 Time(s)

P1300985.JPG



P1300987.JPG
 Description:
Quartz variety smoky and aegirine
Mount Malosa, Zomba, Malawi
51 x 43 x 39 mm
Same as above.
 Viewed:  21999 Time(s)

P1300987.JPG



P1310040.JPG
 Description:
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
53 x 29 x 20 mm
A batch of these 'mysterious' quartz crystals with a yellow coating that can not be removed with the usual acids and small unknown crystals, surfaced in the first few years of this century and apparently not again.
 Viewed:  21957 Time(s)

P1310040.JPG



P1310035.JPG
 Description:
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
53 x 29 x 20 mm
Same as above.
 Viewed:  21909 Time(s)

P1310035.JPG



P1310037.JPG
 Description:
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
53 x 29 x 20 mm
Same as above.
 Viewed:  21931 Time(s)

P1310037.JPG



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PostPosted: May 12, 2014 09:00    Post subject: Re: The collection of Pierre and Riana Joubert  

Hello Pierre,

Those are some nice specimens that you and Riana added to your collection. I especially like the aegirine from Mt. Malosa. It's a very aesthetic piece.

Michael
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PostPosted: May 12, 2014 09:24    Post subject: Re: The collection of Pierre and Riana Joubert  

crosstimber wrote:
Hello Pierre,

Those are some nice specimens that you and Riana added to your collection. I especially like the aegirine from Mt. Malosa. It's a very aesthetic piece.

Michael


I appreciate your kind comment Michael!

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PostPosted: May 12, 2014 11:07    Post subject: Re: The collection of Pierre and Riana Joubert  

Pierre,

I like your amethyst with the mysterious yellow coating.

Don

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PostPosted: May 12, 2014 11:24    Post subject: Re: The collection of Pierre and Riana Joubert  

Don Lum wrote:
Pierre,

I like your amethyst with the mysterious yellow coating.

Don


Hi Don. Thank you for the compliment. That is indeed a strange type of quartz! The shape is very unusual, and the small attached crystals (to us) unknown, but the yellow coating needs explaining as it does not come off in oxalic acid. I see one major dealer calls it citrine, but I am quite convinced he is wrong. Perhaps it is a coating of iron oxide on quartz with a final thin protective layer of clear quartz. Best regards from us both.

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PostPosted: May 12, 2014 14:29    Post subject: Re: The collection of Pierre and Riana Joubert  

Here are a few more.


P1300877.JPG
 Description:
Quartz variety smoky, Aegirine and feldspar.
Mount Malosa, Zomba, Malawi.
46 x 41 x 21 mm
 Viewed:  21838 Time(s)

P1300877.JPG



P1300880.JPG
 Description:
Quartz variety smoky, Aegirine and feldspar.
Mount Malosa, Zomba, Malawi.
46 x 41 x 21 mm
Same as above.
 Viewed:  21830 Time(s)

P1300880.JPG



P1300885.JPG
 Description:
Quartz variety smoky, Aegirine and feldspar.
Mount Malosa, Zomba, Malawi.
46 x 41 x 21 mm
Same as above.
 Viewed:  21840 Time(s)

P1300885.JPG



P1300951.JPG
 Description:
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
31 x 10 x 08 mm
 Viewed:  21932 Time(s)

P1300951.JPG



P1300955.JPG
 Description:
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
31 x 10 x 08 mm
Same as above.
 Viewed:  21786 Time(s)

P1300955.JPG



P1300959.JPG
 Description:
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
31 x 10 x 08 mm
Same as above.
 Viewed:  21803 Time(s)

P1300959.JPG



P1310041.JPG
 Description:
Quartz and tourmaline.
Karoi, Mashonaland West, Zimbabwe
25 x 08 x 06 mm
 Viewed:  21821 Time(s)

P1310041.JPG



P1310048.JPG
 Description:
Quartz and tourmaline.
Karoi, Mashonaland West, Zimbabwe
25 x 08 x 06 mm
Same as above.
 Viewed:  21799 Time(s)

P1310048.JPG



P1310050.JPG
 Description:
Quartz and tourmaline.
Karoi, Mashonaland West, Zimbabwe
25 x 08 x 06 mm
Same as above.
 Viewed:  21822 Time(s)

P1310050.JPG



P1300971.JPG
 Description:
Smithsonite
Skorpion Mine, Rosh Pinah, Lüderitz, Karas, Namibia
36 x 23 x 20 mm
 Viewed:  21840 Time(s)

P1300971.JPG



P1300977.JPG
 Description:
Smithsonite
Skorpion Mine, Rosh Pinah, Lüderitz, Karas, Namibia
36 x 23 x 20 mm
Same as above.
 Viewed:  21780 Time(s)

P1300977.JPG



P1300974.JPG
 Description:
Smithsonite
Skorpion Mine, Rosh Pinah, Lüderitz, Karas, Namibia
36 x 23 x 20 mm
Same as above.
 Viewed:  21800 Time(s)

P1300974.JPG



P1300943.JPG
 Description:
Quartz variety amethyst and goethite
Brandberg Area, Erongo, Namibia
40 x 26 x 15 mm
Goethite crystal appox. 1.5 mm; a rarity from this area.
 Viewed:  21789 Time(s)

P1300943.JPG



P1300929.JPG
 Description:
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
40 x 26 x 15 mm
Same as above.
 Viewed:  21845 Time(s)

P1300929.JPG



P1300927.JPG
 Description:
Goethite after Pyrite
Brandberg Area, Erongo, Namibia
Approx. 1.5 mm
Pyrite is not often encountered in this area.
 Viewed:  21805 Time(s)

P1300927.JPG



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PostPosted: May 12, 2014 15:17    Post subject: Re: The collection of Pierre and Riana Joubert  

A wonderful post, as usual. Nice job both of you. But you've ruined the continuity! A smithsonite? I know change up is good, but, I was so enjoying all the SiO2.
(I obviously misread the title of the thread, I thought I was quartz collecting S.A.)
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PostPosted: May 13, 2014 01:57    Post subject: Re: The collection of Pierre and Riana Joubert  

vic rzonca wrote:
A wonderful post, as usual. Nice job both of you. But you've ruined the continuity! A smithsonite? I know change up is good, but, I was so enjoying all the SiO2.
(I obviously misread the title of the thread, I thought I was quartz collecting S.A.)


Haha Vic, this is our collection!!! I wish we collected all these ourselves. The other thread is Quartz collecting in SA. I am starting this new day with a self collected specimen (i found in Riana's pocket). This cluster is far better in person and no matter how many photographs, I just cannot do it justice. Best regards:-)



P1280798.JPG
 Description:
Quartz
Western Cape, South Africa
73 x 50 x 37 mm
 Viewed:  21639 Time(s)

P1280798.JPG



P1310025.JPG
 Description:
Quartz
Western Cape, South Africa
73 x 50 x 37 mm
Same as above.
 Viewed:  21670 Time(s)

P1310025.JPG



P1280808.JPG
 Description:
Quartz
Western Cape, South Africa
73 x 50 x 37 mm
Same as above.
 Viewed:  21647 Time(s)

P1280808.JPG



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PostPosted: May 13, 2014 06:03    Post subject: Re: The collection of Pierre and Riana Joubert  

A few more.


P1300996.JPG
 Description:
Aegerine, quartz and feldspar
Mount Malosa, Zomba, Malawi.
32 x 24 x 16 mm
 Viewed:  21635 Time(s)

P1300996.JPG



P1300998.JPG
 Description:
Aegerine, quartz and feldspar
Mount Malosa, Zomba, Malawi.
32 x 24 x 16 mm
Same as above.
 Viewed:  21595 Time(s)

P1300998.JPG



P1300989.JPG
 Description:
Aegerine, quartz and feldspar
Mount Malosa, Zomba, Malawi.
32 x 24 x 16 mm
Same as above.
 Viewed:  21579 Time(s)

P1300989.JPG



P1300821.JPG
 Description:
Quartz variety smoky
Brandberg Area, Erongo, Namibia
62 x 30 x 28 mm
 Viewed:  21605 Time(s)

P1300821.JPG



P1270974.JPG
 Description:
Quartz variety smoky
Brandberg Area, Erongo, Namibia
62 x 30 x 28 mm
Same as above.
 Viewed:  21600 Time(s)

P1270974.JPG



P1270969.JPG
 Description:
Quartz variety smoky
Brandberg Area, Erongo, Namibia
62 x 30 x 28 mm
Same as above.
 Viewed:  21622 Time(s)

P1270969.JPG



P1300913.JPG
 Description:
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
28 x 16 x 15 mm
 Viewed:  21619 Time(s)

P1300913.JPG



P1300904.JPG
 Description:
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
28 x 16 x 15 mm
Same as above.
 Viewed:  21583 Time(s)

P1300904.JPG



P1300900.JPG
 Description:
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
28 x 16 x 15 mm
Same as above.
 Viewed:  21619 Time(s)

P1300900.JPG



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PostPosted: May 13, 2014 10:19    Post subject: Re: The collection of Pierre and Riana Joubert  

Very nice cluster of clear quartz. It is nice that Riana lets you dig in Riana's pocket :-)

Don

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PostPosted: May 13, 2014 10:22    Post subject: Re: The collection of Pierre and Riana Joubert  

Pierre Joubert wrote:
Don Lum wrote:
Pierre,

I like your amethyst with the mysterious yellow coating.

Don


Hi Don. Thank you for the compliment. That is indeed a strange type of quartz! The shape is very unusual, and the small attached crystals (to us) unknown, but the yellow coating needs explaining as it does not come off in oxalic acid. I see one major dealer calls it citrine, but I am quite convinced he is wrong. Perhaps it is a coating of iron oxide on quartz with a final thin protective layer of clear quartz. Best regards from us both.


Most "citrine" on the market is really heat-treated amethyst, wherein it takes on a similar hue to your piece (real citrine is usually more subdued and more greenish). Perhaps your quartz was heated on one end, either naturally or artificially?
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PostPosted: May 13, 2014 12:38    Post subject: Re: The collection of Pierre and Riana Joubert  

Hi Don. Only I have that privelege! (digging in Riana's pocket):-)

Hi Rei. Eish! I don't know what to make of your explanation of the yellow colour?! but who knows what these dealers are up to! :-):-)

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PostPosted: May 13, 2014 12:48    Post subject: Re: The collection of Pierre and Riana Joubert  

Pierre Joubert wrote:
Hi Rei. Eish! I don't know what to make of your explanation of the yellow colour?! but who knows what these dealers are up to! :-):-)

They seem inclusions of iron oxides coating multiple growing phantoms located very close of the surface of the crystals...
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PostPosted: May 13, 2014 13:08    Post subject: Re: The collection of Pierre and Riana Joubert  

Jordi Fabre wrote:
Pierre Joubert wrote:
Hi Rei. Eish! I don't know what to make of your explanation of the yellow colour?! but who knows what these dealers are up to! :-):-)

They seem inclusions of iron oxides coating multiple growing phantoms located very close of the surface of the crystals...


Hi Jordi. That was my first impression too. I studied the specimen again and if you tilt it, you can see the shine of a very thin final coating of quartz over the iron oxide. A section close to the base has a few small bits of yellow oxide trapped in a thicker layer of quartz. Thank you for your input.

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PostPosted: May 13, 2014 14:06    Post subject: Re: The collection of Pierre and Riana Joubert  

Ignore the woo-woo stuff, and it's spot on. Shape and color-wise, yours matches heated amethyst. Now, that can happen naturally... but usually it's done artificially, because amethyst is cheap and citrine is more expensive.
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PostPosted: May 13, 2014 15:36    Post subject: Re: The collection of Pierre and Riana Joubert  

Recommended reading: Citrine from Brazil?
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