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25th Feb 2021 11:10 UTCGeorges Favreau Manager

00154700016091328778254.jpg
Aurichalcite
Omega Mine, Monument Mountain, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA
Copyright © matt mcgill
Nice picture, thank you! Is there a chance that it could be rosasite?
Best wishes,
Georges Favreau

25th Feb 2021 19:19 UTCKevin Conroy Manager

Georges, the rosasite specimens that I've seen from the Omega Mine tend to be more compact (it's harder to see the free-standing crystals), and they're a little more blue-green than the aurichalcite crystals.   I think that this one is identified correctly.

20th Sep 2021 23:25 UTCMatt McGill 🌟

I've also had someone suggest that it may be aurichalcite pseudomorph after rosasite as well, but not sure.
 
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