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Yellow uraninite?

Posted by Reiner Mielke  
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Reiner Mielke January 12, 2018 11:09PM
https://www.mindat.org/photo-49391.html this is not uraninite.
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David Von Bargen January 13, 2018 09:42AM
That is making the assumption that the yellow material in the photo is the uraninite. There is a lot of black material in the photo and without an adequate descriptive text or listing of multiple minerals, one doesn't know what area is supposed to be the uraninite.
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Rui Nunes January 13, 2018 06:47PM
It's an old specimen/poor photo and will try obtain a better one tomorrow. Yes, the indication for uraninite is the black material. The locality is https://www.mindat.org/loc-30595.html (Osamu Utsumi mine, Campo do Cercado, Caldas, Poços de Caldas alkaline complex, Minas Gerais, Brazil).
Thanks



Edited 1 time(s). Last edit at 01/13/2018 06:48PM by Rui Nunes.
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Keith Compton January 17, 2018 09:11AM
Rui

Which is one reason why we like to see a brief description of what we can see in the photo, i.e.: which mineral is which etc. This is a never ending issue for us.

I was going to add add a frivolous comment that it was probably "yellow-cake" but decided against it ... but hey.

Cheers
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Rui Nunes January 17, 2018 09:37AM
Yes, I agree, I like to see a brief description of what I can see in the photo too... but I did not find it funny.
Cheers
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Reiner Mielke January 17, 2018 01:03PM
It would be worth while getting the orange mineral analyzed as there is nothing listed there that matches what it looks like. It may be a new species for the locality.
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Rui Nunes January 17, 2018 11:57PM
Maybe yes, but doing mineral analysis here is not easy...this yellow material will stay for a next opportunity
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