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Fervanite with Montroseite

#39624

Fervanite with Montroseite

#39624
Availability
Sold
Size
5.5 x 4 x 2 cm - Sm Cabinet 
Formula
Fe3+4V5+4O16·5H2O (RRUFF)
Locality
Jo Dandy mine, Montrose Co., Colorado, United States
Tagged
vanadium

Brown Fervanite with black Montroseite and a bit of yellow Tyuyamunite. This is a great example of multiple mineralogical phases in bands formed outward from a central impregnating vein.

Fervanite

Formula
Fe3+4V5+4O16·5H2
Crystal System
Monoclinic 
Crystal Habit
Fibrous 
Cleavage
None, None, None 
Luster
Adamantine 
Color
yellow, brown, pale green 
Streak
yellowish brown 
Class
Monoclinic 
Hardness

Data courtesy of Webmineral.

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