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Rhodochrosite : MnCO3, Tsumcorite : PbZn2(AsO4)2·2H2O, Galena : PbS

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For details about 3D refer to: Mindat manuals: Mindat Media Viewer: 3D

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Summary of all keyboard shortcuts

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Copyright © Fabre Minerals https://www.fabreminerals.com
 
 
 
 
 
minID: 2A8-6EN

Rhodochrosite : MnCO3, Tsumcorite : PbZn2(AsO4)2·2H2O, Galena : PbS

Copyright © Fabre Minerals https://www.fabreminerals.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 40 mm x 27 mm x 22 mm
Largest Crystal Size: 11 mm

Scalenohedral crystals of Rhodochrosite, very infrequent in Tsumeb, of intense pink color, implanted on a matrix rich of Galena and yellow crystals of Tsumcorite.
Tsumeb Mine, Tsumeb, Namibia.
Minor fluorescence short UV
Former Desmond Sacco collection.

This photo has been shown 1008 times
Photo added:7th Jun 2010
Dimensions:701x807px (0.57 megapixels)

Data Identifiers

Mindat Photo ID:313243 📋 (quote this with any query about this photo)
Long-form Identifier:mindat:1:4:313243:9 📋
GUID:084e24cd-b59d-4589-b16a-85f67f25aa3f 📋
Specimen MinID2A8-6EN (note: this is not unique to this photo, it is unique to the specimen)

Other Views - click to switch

Discuss this Photo

PhotosRhodochrosite - Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia

23rd Nov 2016 06:12 UTCRichard Geiger

For the record: Due to a stroke of great good fortune, I was able to acquired this this specimen from Jordi in June of 2010.

The entry in my catalog is http://rocks.foxcove.com/s_form.php?sid=993

Figured in the book "Rhodochrosite: Crystals of Drama and Nuance" (William S. Logan, M.D., Self-published).


How many species collectors get to own the best specimen of their beloved species from Tsumeb?


Now, I need to find a good Bisbee rhodo...

23rd Nov 2016 14:01 UTCJamison K. Brizendine 🌟 Expert

This is certainly a specimen to be proud of! Wonderful...

23rd Nov 2016 19:19 UTCJim Robison

I remember the day Jordi sold this. I was about ten minutes behind Richard, and missed it. These are extraordinarily rare, and this is a fine piece.

23rd Nov 2016 21:00 UTCMalcolm Southwood 🌟 Expert

Hi Richard,

Have you, for the record, had the tsumcorite verified? That would be very interesting to me for two reasons. Firstly it would provide very strong supportive evidence that the specimen is, indeed, from Tsumeb and, secondly, several members of the tsumcorite group are notoriously difficult to distinguish from one another. As a Tsumeb enthusiast, I'd be interested to know precisely which species the rhodochrosite associates with.

Great specimen, and cheers for now

mal

23rd Nov 2016 21:08 UTCJim Robison

Richard I've forgotten. Did this piece come out of Des Sacco's collection? Seem to think it might have, as Jordi occasionally handles his rocks.

. That may help some with the provenance question, which is always a good one as Mal suggests. I know Bill Logan seemed to feel that it was a legitimate Tsumeb piece, partly I think based on its history.

24th Nov 2016 02:03 UTCMalcolm Southwood 🌟 Expert

JIm, Richard,

Yes, the specimen did originate from Des (as stated in the mindat photo caption, although I suspect it was from Des's trading stock rather than from his collection!). Richard, for some time there has been a note on tsumeb.com (under "rhodochrosite") simply stating that this specimen is listed on mindat, but if you could provide analytical verification of the species and, in so doing give me a little more confidence in the provenance I would, with your permission, like to include a photograph of the specimen in the tsumeb.com database (with proper attribution, of course).

Cheers for now

mal

24th Nov 2016 11:00 UTCPaul De Bondt Manager

Hi Tsumeb lovers,


Personally I was always sceptic about the identity of this specimen.

A positive behavior for a mineral collector, always questionning if the specimen he bought is what is mentionned on the label.


Please don't get me wrong and to be honest, I would love if this is a genuine Tsumeb rhodo. I keep my fingers crossed.

The matrix with the tsumcorite looks much like Tsumeb anyway.


Here I'll play the devil's advocate. Richard gives some analysis data but no one knows that the results are from THAT specimen.

I recall the mid 80's where cobaltoan calcite was labeled and sold as sphaerocobaltite. Worked for years.

Some specimens labeled like that are sometimes encountered in old collection. ( with labels from well known dealers )

I let check almost all my specimens to be sure the label is correct.

Cost me some money but I prefer this rather than collecting mislabeled species or ?????.


Jim, I was probably the second person in the row for it. Just when I decided to click, it showed " reserved ". I could have eaten my shoes. I was not easy to handle that day.:-X


Malcolm, Tsumeb.com is a great site. I would suggest all Tsumeb fans to take a look.;-)


Cheers.


Paul.

24th Nov 2016 21:12 UTCJim Robison

Paul Regarding your shoes I know the feeling well. :-)
 
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