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Identity HelpYellow cuprite ?

28th Feb 2012 20:47 UTCCorrado Balestra Expert

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.

http://www.mindat.org/loc-54891.html

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.

Corrado

28th Feb 2012 21:38 UTCMatt Wall

Looks like an efflorescent uranium mineral, like Phurcalite or maybe something not uranium, perhaps! :-)
 
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