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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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 Posted: Dec 05, 2013 03:21 Post subject: Re: The collection of Pierre and Riana Joubert |
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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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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 1343
Location: Cambridge
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| Posted: Dec 05, 2013 04:38 Post subject: Re: The collection of Pierre and Riana Joubert |
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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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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: Dec 05, 2013 05:01 Post subject: Re: The collection of Pierre and Riana Joubert |
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| 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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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: Dec 11, 2013 12:52 Post subject: Re: The collection of Pierre and Riana Joubert |
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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.
| 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. |
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| Viewed: |
22615 Time(s) |
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| Description: |
Opal (variety hyalite) on smoky quartz.
Erongo mountains; Namibia
60 x 42 x 24 mm |
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| Viewed: |
22636 Time(s) |
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| Description: |
Smoky Quartz
Erongo mountains; Namibia
F.O.V. 27 mm
This is the back side of the Hyalite specimen above. |
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| Viewed: |
22618 Time(s) |
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| Description: |
Quartz with hematite
Pella, Orange river, Northern Cape, SA
42 x 29 x 18 mm |
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| Viewed: |
22627 Time(s) |
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| Description: |
Quartz with hematite
Pella, Orange river, Northern Cape, SA
42 x 29 x 18 mm
Same as above. |
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| Viewed: |
22551 Time(s) |
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| Description: |
Quartz with hematite
Pella, Orange river, Northern Cape, SA
42 x 29 x 18 mm
Same as above. |
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| Viewed: |
22606 Time(s) |
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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: May 12, 2014 07:29 Post subject: Re: The collection of Pierre and Riana Joubert |
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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.
| Description: |
Aegerine and feldspar
Mount Malosa, Zomba, Malawi.
68 x 52 x 27 mm |
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| Viewed: |
22186 Time(s) |
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| Description: |
Aegerine and feldspar
Mount Malosa, Zomba, Malawi.
68 x 52 x 27 mm
Same as above. |
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| Viewed: |
22151 Time(s) |
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| Description: |
Aegerine and feldspar
Mount Malosa, Zomba, Malawi.
68 x 52 x 27 mm
Same as above. |
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| Viewed: |
22214 Time(s) |
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| Description: |
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
57 x 49 x 41 mm |
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| Viewed: |
22198 Time(s) |
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| Description: |
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
57 x 49 x 41 mm
Same as above. |
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| Viewed: |
22213 Time(s) |
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| Description: |
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
57 x 49 x 41 mm
Same as above. |
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| Viewed: |
22203 Time(s) |
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| Description: |
Quartz variety smoky and aegirine
Mount Malosa, Zomba, Malawi
51 x 43 x 39 mm |
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| Viewed: |
22151 Time(s) |
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| Description: |
Quartz variety smoky and aegirine
Mount Malosa, Zomba, Malawi
51 x 43 x 39 mm
Same as above. |
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| Viewed: |
22155 Time(s) |
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| Description: |
Quartz variety smoky and aegirine
Mount Malosa, Zomba, Malawi
51 x 43 x 39 mm
Same as above. |
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| Viewed: |
22212 Time(s) |
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| 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. |
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| Viewed: |
22171 Time(s) |
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| Description: |
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
53 x 29 x 20 mm
Same as above. |
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| Viewed: |
22123 Time(s) |
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| Description: |
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
53 x 29 x 20 mm
Same as above. |
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| Viewed: |
22144 Time(s) |
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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2066
Location: Oklahoma
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| Posted: May 12, 2014 09:00 Post subject: Re: The collection of Pierre and Riana Joubert |
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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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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: May 12, 2014 09:24 Post subject: Re: The collection of Pierre and Riana Joubert |
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| 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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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: May 12, 2014 11:07 Post subject: Re: The collection of Pierre and Riana Joubert |
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Pierre,
I like your amethyst with the mysterious yellow coating.
Don
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: May 12, 2014 11:24 Post subject: Re: The collection of Pierre and Riana Joubert |
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| 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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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: May 12, 2014 14:29 Post subject: Re: The collection of Pierre and Riana Joubert |
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Here are a few more.
| Description: |
Quartz variety smoky, Aegirine and feldspar.
Mount Malosa, Zomba, Malawi.
46 x 41 x 21 mm |
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| Viewed: |
22050 Time(s) |
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| Description: |
Quartz variety smoky, Aegirine and feldspar.
Mount Malosa, Zomba, Malawi.
46 x 41 x 21 mm
Same as above. |
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| Viewed: |
22042 Time(s) |
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| Description: |
Quartz variety smoky, Aegirine and feldspar.
Mount Malosa, Zomba, Malawi.
46 x 41 x 21 mm
Same as above. |
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| Viewed: |
22054 Time(s) |
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| Description: |
Quartz variety amethyst.
Brandberg Area, Erongo, Namibia
31 x 10 x 08 mm |
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| Viewed: |
22144 Time(s) |
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| Description: |
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
31 x 10 x 08 mm
Same as above. |
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| Viewed: |
21998 Time(s) |
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| Description: |
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
31 x 10 x 08 mm
Same as above. |
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| Viewed: |
22016 Time(s) |
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| Description: |
Quartz and tourmaline.
Karoi, Mashonaland West, Zimbabwe
25 x 08 x 06 mm |
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| Viewed: |
22034 Time(s) |
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| Description: |
Quartz and tourmaline.
Karoi, Mashonaland West, Zimbabwe
25 x 08 x 06 mm
Same as above. |
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| Viewed: |
22013 Time(s) |
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| Description: |
Quartz and tourmaline.
Karoi, Mashonaland West, Zimbabwe
25 x 08 x 06 mm
Same as above. |
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| Viewed: |
22035 Time(s) |
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| Description: |
Smithsonite
Skorpion Mine, Rosh Pinah, Lüderitz, Karas, Namibia
36 x 23 x 20 mm |
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| Viewed: |
22053 Time(s) |
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| Description: |
Smithsonite
Skorpion Mine, Rosh Pinah, Lüderitz, Karas, Namibia
36 x 23 x 20 mm
Same as above. |
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| Viewed: |
21993 Time(s) |
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| Description: |
Smithsonite
Skorpion Mine, Rosh Pinah, Lüderitz, Karas, Namibia
36 x 23 x 20 mm
Same as above. |
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| Viewed: |
22013 Time(s) |
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| 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. |
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| Viewed: |
22001 Time(s) |
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| Description: |
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
40 x 26 x 15 mm
Same as above. |
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| Viewed: |
22058 Time(s) |
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| Description: |
Goethite after Pyrite
Brandberg Area, Erongo, Namibia
Approx. 1.5 mm
Pyrite is not often encountered in this area. |
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| Viewed: |
22019 Time(s) |
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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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vic rzonca
Joined: 18 Nov 2008
Posts: 820
Location: MA
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| Posted: May 12, 2014 15:17 Post subject: Re: The collection of Pierre and Riana Joubert |
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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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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: May 13, 2014 01:57 Post subject: Re: The collection of Pierre and Riana Joubert |
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| 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:-)
| Description: |
Quartz
Western Cape, South Africa
73 x 50 x 37 mm |
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| Viewed: |
21852 Time(s) |
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| Description: |
Quartz
Western Cape, South Africa
73 x 50 x 37 mm
Same as above. |
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| Viewed: |
21882 Time(s) |
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| Description: |
Quartz
Western Cape, South Africa
73 x 50 x 37 mm
Same as above. |
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| Viewed: |
21859 Time(s) |
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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: May 13, 2014 06:03 Post subject: Re: The collection of Pierre and Riana Joubert |
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A few more.
| Description: |
Aegerine, quartz and feldspar
Mount Malosa, Zomba, Malawi.
32 x 24 x 16 mm |
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| Viewed: |
21847 Time(s) |
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| Description: |
Aegerine, quartz and feldspar
Mount Malosa, Zomba, Malawi.
32 x 24 x 16 mm
Same as above. |
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| Viewed: |
21807 Time(s) |
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| Description: |
Aegerine, quartz and feldspar
Mount Malosa, Zomba, Malawi.
32 x 24 x 16 mm
Same as above. |
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| Viewed: |
21794 Time(s) |
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| Description: |
Quartz variety smoky
Brandberg Area, Erongo, Namibia
62 x 30 x 28 mm |
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| Viewed: |
21818 Time(s) |
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| Description: |
Quartz variety smoky
Brandberg Area, Erongo, Namibia
62 x 30 x 28 mm
Same as above. |
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| Viewed: |
21813 Time(s) |
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| Description: |
Quartz variety smoky
Brandberg Area, Erongo, Namibia
62 x 30 x 28 mm
Same as above. |
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| Viewed: |
21835 Time(s) |
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| Description: |
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
28 x 16 x 15 mm |
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| Viewed: |
21832 Time(s) |
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| Description: |
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
28 x 16 x 15 mm
Same as above. |
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| Viewed: |
21796 Time(s) |
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| Description: |
Quartz variety amethyst
Brandberg Area, Erongo, Namibia
28 x 16 x 15 mm
Same as above. |
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| Viewed: |
21833 Time(s) |
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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: May 13, 2014 10:19 Post subject: Re: The collection of Pierre and Riana Joubert |
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Very nice cluster of clear quartz. It is nice that Riana lets you dig in Riana's pocket :-)
Don
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Rei
Joined: 09 Apr 2014
Posts: 228
Location: Höfuðborgarsvæði
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| Posted: May 13, 2014 10:22 Post subject: Re: The collection of Pierre and Riana Joubert |
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| 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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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: May 13, 2014 12:38 Post subject: Re: The collection of Pierre and Riana Joubert |
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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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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4893
Location: Barcelona
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| Posted: May 13, 2014 12:48 Post subject: Re: The collection of Pierre and Riana Joubert |
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| 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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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: May 13, 2014 13:08 Post subject: Re: The collection of Pierre and Riana Joubert |
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| 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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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Rei
Joined: 09 Apr 2014
Posts: 228
Location: Höfuðborgarsvæði
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| Posted: May 13, 2014 14:06 Post subject: Re: The collection of Pierre and Riana Joubert |
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| 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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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4893
Location: Barcelona
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| Posted: May 13, 2014 15:36 Post subject: Re: The collection of Pierre and Riana Joubert |
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| Recommended reading: Citrine from Brazil?
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