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PhotosRosasite - Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia

6th May 2016 23:43 UTCDebbie Woolf Manager

08277280016027501338665.jpg
Rosasite
Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia
Copyright © Manfred Mader
I think this is malachite with baryte from the Congo, anyone agree? Paul?

7th May 2016 00:58 UTCKeith Compton 🌟 Manager

Hi Debbie


Difficult for a photo, but if I had to guess the specimen in toto I would have plumbed for Hemimorphite on either Rosasite or Malachite from Nevada or Mapimi. There appears to be Limonite like matrix associated.

But I am not familiar enough with Tsumeb.


Cheers

Keith

7th May 2016 06:38 UTCRalph S Bottrill 🌟 Manager

Im inclined to agree with malachite Debbie, though it depends on the lighting; also the barytes i have seen from Congo there are typically blockier, this resembles hemimorphite more to me. But that would be an unusual association though.

7th May 2016 10:09 UTCPaul De Bondt Manager

This is not baryte but rather hemimorphite.

This is not a Congo specimen.

Would like to see more of the matrix to match perhaps a locality.


Cheers.


Paul.

7th May 2016 12:32 UTCDebbie Woolf Manager

Thank you very much gentlemen :-)


I'm not familiar with hemimorphite at all. I checked my Tsumeb refs and malachite or rosasite are not associated with hemimorphite, it forms masses and small tabular crystals to a few mm and is quoted as very rare. I'm doubtful this is a Tsumeb specimen.

7th May 2016 19:56 UTCRonald J. Pellar Expert

Definitely hemimorphite, Could be from Ojuela mine, Mapimi, Mexico.
 
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