Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Sherwoodite from
Peanut Mine, Bull Canyon, Montrose County, Colorado, USA


Locality type:Mine
Classification
Species:Sherwoodite
Formula:Ca5.5(AlV4+V125+O39) · 28H2O
Chemical Analyses:
Empirical formulas:
1(Ca4.26Mg1.09Na0.35K0.04Sr0.03)[Al0.87(V4+V5+12)O39]·28.15H2O
Sample references:
1 -
Comments:This Colorado type species is an oxidation product of other vanadium minerals and occurs as dark blue-black crystals that coat fracture surfaces and partings in sandstones or along fractures in coalified wood. It is commonly associated with native seleni
Confirmation
Validity:Valid - Type Locality
Data
Mineral Data:Click here to view Sherwoodite data
Locality Data:Click here to view Peanut Mine, Bull Canyon, Montrose County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:30130
Long-form Identifier:1:3:30130:7
GUID (UUID V4):0
Nearest other occurrences of Sherwoodite
2.1km (1.3 miles) Jo Dandy Mine, Paradox Valley, Montrose County, Colorado, USA
2.8km (1.7 miles) Mineral Joe No. 1 Mine, Paradox Valley, Montrose County, Colorado, USA
2.9km (1.8 miles) J J Mine, Paradox Valley, Montrose County, Colorado, USA
15.5km (9.6 miles) West Sunday Mine, Slick Rock Mining District, Colorado, USA
15.9km (9.9 miles) Sunday Mine, Slick Rock Mining District, Colorado, USA
21.5km (13.3 miles) Burro Mine, San Miguel County, Colorado, USA
29.2km (18.2 miles) Blue Cap Mine, La Sal Creek Mining District, San Juan County, Utah, USA
30.9km (19.2 miles) Mucho Grande Mine, San Miguel County, Colorado, USA
30.9km (19.2 miles) Vanadium Queen Mine, La Sal Creek Mining District, San Juan County, Utah, USA
32.0km (19.9 miles) Firefly–Pigmay Mine, La Sal Creek Mining District, San Juan County, Utah, USA
References
 
and/or  
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