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Andreas Schloth January 16, 2017 09:58PM
This for sure is a mineral from the Fornacite-Vauqulinite series. Look at the crystal forms and faces. Color or better opacity depends on the direction light falls on it and on the thickness of the crystals. THIS IS FORNACITE!



Edited 1 time(s). Last edit at 01/16/2017 10:03PM by Andreas Schloth.
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Chester S. Lemanski, Jr. January 16, 2017 10:56PM
Or is it molybdofornacite? Analysis required.
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Jeff Weissman January 16, 2017 11:15PM
For what its worth, molybdofornacite tends to be lighter green than fornacite, although color is not always reliable. I have been calling these crystals fornacite.

Andreas - Joy has his own SEM/EDS system, did he provide analysis or can you ask? Will be interesting to know one way or the other.
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Andreas Schloth June 13, 2018 08:44PM
Had checked this out via EDS on a nearby similar looking crystal. It's pure Fornacite. No Molybdenum.



Is there the possibilty to change this picture to public?
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Uwe Kolitsch June 13, 2018 09:02PM
Done.
I have changed the caption to:

Fornacite crystals (EDS analysed). This piece was originally obtained from Joy Desor as "molybdofornacite".
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Andreas Schloth June 13, 2018 09:05PM
Thank you!
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Joy Desor June 13, 2018 11:22PM
I randomly spotted this discussion and my Eds detector is still in repair. So I can’t do any sem eds analysis the next month.
Thanks for the enlightenment

Joy
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