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Hausmannite and ?
  
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Mathias




Joined: 01 Apr 2018
Posts: 103
Location: Vlodrop

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PostPosted: Aug 11, 2019 08:43    Post subject: Hausmannite and ?  

2 weeks ago, I bought a specimen of Hausmannite.
5 cm wide, 4 cm high.

Besides some Hausmannite crystals it contatains a dark black velvet like mineral.
Perhaps psilomelane but I am not sure.
On mindat there are no Kuruman Hausmannite photo's showing this addition.

Is there anybody who recognizes this mineral?

Thanks,

Mathias



611E.JPG
 Mineral: Hausmannite
 Locality:
Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
 Dimensions: 5 cm * 4 cm * 2 cm
 Description:
 Viewed:  324 Time(s)

611E.JPG



611K.JPG
 Description:
 Viewed:  322 Time(s)

611K.JPG


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Tobi




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PostPosted: Aug 11, 2019 10:57    Post subject: Re: Hausmannite and ?  

Mathias wrote:
2 weeks ago, I bought a specimen of Hausmannite.
5 cm wide, 4 cm high.
Besides some Hausmannite crystals it contatains a dark black velvet like mineral.
Perhaps psilomelane but I am not sure.
On mindat there are no Kuruman Hausmannite photo's showing this addition.
Is there anybody who recognizes this mineral?
Thanks,
Mathias
Hi Mathias, it may sound strange but my guess is - hausmannite. I remember that I have seen some specimens of botryoidal hausmannite from the N'Chwaning mines (which are the locality near Kuruman that produces the beautiful crystallized hausmannite) and they looked very similar. So I think this could be not a paragenesis but a specimens with two generations of hausmannite ...

Just a guess, I hope anyone can confirm or really find out what else it could be.

Tobi
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Mathias




Joined: 01 Apr 2018
Posts: 103
Location: Vlodrop

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PostPosted: Aug 11, 2019 11:32    Post subject: Re: Hausmannite and ?  

Thanks Tobi,

I haven't considered this option, but I think you are right. Thanks!
This was also on the label: Haldenfund 1995 Angelikastohl.

Best regards,
Mathias.
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