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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Psilomelane from
Boreas Mine, Escabrosa Ridge, Bisbee, Cochise County, Arizona, USA


Locality type:Mine
Classification
Species:'Psilomelane' (not an IMA approved species)
Comments:Very bunchy & not everywhere closely assoc. with recognizable fissures.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Psilomelane data
Locality Data:Click here to view Boreas Mine, Escabrosa Ridge, Bisbee, Cochise County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:210685
Long-form Identifier:1:3:210685:4
GUID (UUID V4):0
Nearest other occurrences of Psilomelane
0.6km (0.4 miles) ⓘAtlas claim, Bisbee, Cochise County, Arizona, USA
0.7km (0.5 miles) ⓘNo. 4 claim, Escabrosa Ridge, Bisbee, Cochise County, Arizona, USA
0.8km (0.5 miles) ⓘDanville-Hanchetta claims, Bisbee, Cochise County, Arizona, USA
1.0km (0.7 miles) ⓘBay State Mine, Bisbee, Cochise County, Arizona, USA
1.7km (1.0 miles) ⓘIllinois claim, Calumet and Arizona group of claims, Bisbee, Cochise County, Arizona, USA
1.7km (1.1 miles) ⓘNellie claim, Calumet and Arizona group of claims, Bisbee, Cochise County, Arizona, USA
1.8km (1.1 miles) ⓘTopgallant claim, Calumet and Arizona group of claims, Bisbee, Cochise County, Arizona, USA
1.9km (1.2 miles) ⓘCochise claim, Calumet and Arizona group of claims, Bisbee, Cochise County, Arizona, USA
1.9km (1.2 miles) ⓘSt. Louis claim, Calumet and Arizona group of claims, Bisbee, Cochise County, Arizona, USA
2.1km (1.3 miles) ⓘNew Era claim, Calumet and Arizona group of claims, Bisbee, Cochise County, Arizona, USA
References
Jones, E.L., Jr. & F.L. Ransome (1920), Deposits of manganese ore in Arizona, USGS Bull. 710-D: 110.
Wilson, E.D. & G.M. Butler (1930), Manganese ore deposits in AZ, AZ Bur. of Mines Bull. 127: 43
 
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