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Yellow cuprite ?

Posted by Corrado Balestra  
Corrado Balestra February 28, 2012 08:47PM
Hello everybody,

I have just checked by eds a yellow earthy/waxy encrustation intergrown with cuprite xx (see pic - fov 6 mm).
Locality is the old manganese mine of Monte Nero, Liguria, Italy.
I am sure I correctly sampled the pure yellow stuff but the eds response (for atomic numbers >10) was only Cu.
Shall I consider that stuff still cuprite ?
Do you know cuprites having that macroscopic appearance ?
Thank you very much in advance for your thoughts.
open | download - DSCN3365.JPG (760.3 KB)
Matt Wall February 28, 2012 09:38PM
Looks like an efflorescent uranium mineral, like Phurcalite or maybe something not uranium, perhaps! :-)
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