This photo was viewed 0 times and was downloaded in full size 0 times.

This photo was liked 0 times

Source page: http://commons.wikimedia.org/wiki/File:Dioptase-232936.jpg


English: Dioptase
Locality: Rodgerberg Mine, Guchab-Rodgerberg area, Grootfontein District, Otjozondjupa Region, Namibia (Locality at mindat.org)
Size: 9.1 x 7.1 x 5.6 cm.
I traded this specimen from Evan Jones, the dealer who dispersed the Russell Jones collection (no family relation), and it comes with his label, noting the date from the catalogue. This specimen was obtained by collector Russell Jones in 1939, according to his catalogue. Dioptase from Tsumeb, this we all know. But much Tsumeb dioptase of this quality did not come to market until the 1970s and 1980s. There is a tendency to assume that all fine dioptase from Africa came from Tsumeb. However, this small mine some distance away, Guchab, actually produced the first great Namibian dioptase in the 1930s, long before the richness of Tsumeb dioptase was known to the collecting community at large. Guchab is also famous for incredible large Descloizite crystals. It turns out that these dioptase specimens were much rarer then, and remain much so today as well. This specimen is a beautiful small cabinet piece by any standard, no matter where it is from. It has sharp crystals to just over 1 cm smothering a matrix coated with calcite. The matrix is literally a gangue rock, not ore as at Tsumeb. Also, the calcite is subtly different in style from Tsumeb...more sparkly, for one. The crystals are not the small sharp rhomobohedra you usually see with Tsumeb dioptase, but rather little jewel-like crystals of more complexity, rhombs modified by other terminations. So, in person, this piece really is distinct.
Deutsch: Dioptas
Fundort: Rodgerberg Mine, Guchab-Rodgerberg area, Distrikt Grootfontein, Otjozondjupa, Namibia (Fundort bei mindat.org)
Größe: 9.1 x 7.1 x 5.6 cm.
Date before March 2010(2010-03)
Source http://www.mindat.org/photo-232936.html
Other versions


Rob Lavinsky, the copyright holder of this work, hereby publishes it under the following license:
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
  • share alike – If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.

OTRS Wikimedia The permission for use of this work has been archived in the Wikimedia OTRS system.
It is available as ticket #2010022810018255 for users with an OTRS account. If you wish to reuse this work elsewhere, please read the instructions at COM:REUSE. If you are a Commons user and wish to confirm the permission, please leave a note at the OTRS noticeboard.

Ticket link: https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom&TicketNumber=2010022810018255

Creative Commons Attribution-Share Alike 3.0 Unported


Only registered users can post comments. Please login

EXIF data:
File name dioptase-232936.jpg
Size, bytes 50220
Mime type image/jpeg
The images at Free-Photos.biz come mainly from Wikimedia Commons or from our own production. The photos are either in the public domain, or licensed under free linceses: Free-Photos.biz license, GPL, Creative Commons or Free-Art license. Some very few other photos where uploaded to Free-Photos.biz by our users and released into the public domain or into free usage under another free license (like GPL etc.)

All photos in average size can be saved by everyone without registration (by right-clicking) - and all photos can be downloaded in full-size and without the big watermark by members (by left-clicking) (registration and free membership required).

While the copyright and licensing information supplied for each photo is believed to be accurate, Free-Photos.biz does not provide any warranty regarding the copyright status or correctness of licensing terms. If you decide to reuse the images from Free-Photos.biz, you should verify the copyright status of each image just as you would when obtaining images from other sources.

The use of depictions of living or deceased persons may be restricted in some jurisdictions by laws regarding personality rights. Such images are exhibited at Free-Photos.biz as works of art that serve higher artistic interests.

christianity portal