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Quartz (Var: Amethyst) : SiO2, Microcline : K(AlSi3O8)

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Copyright © Y.Okazaki
 
 
minID: EAX-CEG

Quartz (Var: Amethyst) : SiO2, Microcline : K(AlSi3O8)

Copyright © Y.Okazaki  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 63 mm x 37 mm x 43 mm

The Amethyst crystal 36mm.
63x37x43mm overall size.

This photo has been shown 1014 times
Photo added:29th Aug 2011
Dimensions:533x800px (0.43 megapixels)
Date/Time of Photo:28th Aug 2011 23:32:15
Camera:CANON EOS 7D
Software:Capture NX 2.2.0 W
Exposure time:5s
Aperture:f/25.0
Focal Length:60mm
ISO speed:200
View Y. Okazaki's Photos View Amethyst Gallery

Discuss this Photo

PhotosAmethyst - Tafelkop, Goboboseb Mountains, Brandberg area, Brandberg District, Erongo Region, Namibia

28th Oct 2011 19:46 BSTHerman Du Plessis

If you click in the title of the message, the amethyst does not seem likely to come from tafelkop, the base of the matrix seems to me to be more of a granite than a basalt? and it looks like there are some orthoclase crystals there as well?


let me know what you all think.


Herman

4th Nov 2011 10:02 GMTErnst A. Schnaitmann Expert

The above mentioned specimen (http://www.mindat.org/photo-408352.htmlhttp://www.mindat.org/photo-408352.html) is definitely not from the Goboboseb Mountains but from Brandberg Proper.

Locality should be changed as such.


Kindest regards

Ernst

4th Nov 2011 10:32 GMTAmir C. Akhavan Manager

Agreed, definitely not Goboboseb.

But couldn't it also be from one of the pegmatite digs west of Brandberg?

4th Nov 2011 15:31 GMTErnst A. Schnaitmann Expert

Hi Amir,


The amethysts come from the Orabes Gorge to the south of Brandberg.

The topaz comes from an area between the Orabes Gorge and the Tsisab Ravine.


The correct locality for the specimen in question would therefore be http://www.mindat.org/loc-158053.html


While we are on the subject I also doubt whether the following specimens are from the Brandberg Complex:

Photo ID: 241124

Photo ID: 264894


I am also not very sure that specimen Photo ID: 333661 is from Brandberg either, I would be very much more inclined to say Goboboseb.


As a matter of interest I have attached some photos of specimens that are definitely from Brandberg.


Kindest regards

Ernst

4th Nov 2011 18:08 GMTRolf Brandt

World Heritage Status


The Brandberg National Monument Area was added to the UNESCO World Heritage Tentative List on October 3, 2002 in the Mixed (Cultural + Natural) category.


Please do not collect specimens from the Brandberg itself. Regards Rolf

4th Nov 2011 20:07 GMTHerman Du Plessis

Rolf


I don't think anyone here said they were removing minerals from there?


Herman

4th Nov 2011 20:49 GMTAmir C. Akhavan Manager

Agreed,

241124 is probably not from Brandberg

264894, well, the crystals are in really bad shape, hard to tell, look like low temp. crystals, but not scepters.

333661, yes, most likely Goboboseb.


Would you care to upload the photos you've posted to the database?


Not sure about the 1st, though.

Looks much like Sorris Sorris to me.


@Rolf

We definitely do not encourage collecting in the protected Brandberg area, but we wouldn't want to give wrong information about the provenance of specimens either.

5th Nov 2011 18:07 GMTErnst A. Schnaitmann Expert

Photos uploaded!


The Amethyst is definitely not from Sorris-Sorris but I’m glad to know that you are familiar with the locality.

While on the subject I see that Sorris-Sorris 186 is not loaded on Mindat – I will attend to this shortly.


Kindest regards

Ernst

6th Nov 2011 09:49 GMTAmir C. Akhavan Manager

Great! Thanks a lot for uploading the pics!

6th Nov 2011 10:24 GMTErnst A. Schnaitmann Expert

Sorris-Sorris 186, uploaded as a new locality as well http://www.mindat.org/loc-234372.html.

If you have any specimens from there please upload them - I will try to take some photos of our material and post it as soon as possible.

6th Nov 2011 17:53 GMTRolf Brandt

Thanks Amir, that is acceptable. Regards Rolf
 
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