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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Pyrolusite from
McComber Mine (Lucy Mine; Pendill; East Jackson), Negaunee, Marquette County, Michigan, USA


04535920017272032379332.jpg
Pyrolusite

McComber Mine, Negaunee, Marquette County, Michigan, USA
04535920017272032379332.jpg
Pyrolusite

McComber Mine, Negaunee, Marquette County, Michigan, USA
04535920017272032379332.jpg
Pyrolusite

McComber Mine, Negaunee, Marquette County, Michigan, USA
Locality type:Mine
Classification
Species:Pyrolusite
Formula:Mn4+O2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view McComber Mine (Lucy Mine; Pendill; East Jackson), Negaunee, Marquette County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:78359
Long-form Identifier:1:3:78359:2
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
0.5km (0.3 miles) ⓘJackson Mine (South Jackson pit), Negaunee, Marquette County, Michigan, USA
1.1km (0.7 miles) ⓘManganese Mine (Aetna; Schadt; Etna), Negaunee, Marquette County, Michigan, USA
2.7km (1.7 miles) ⓘMather A shaft, Mather Mine (Pioneer pellet plant; Ore improvement plant), Negaunee, Marquette County, Michigan, USA
65.6km (40.8 miles) ⓘTaylor Mine, Alberta, Baraga County, Michigan, USA
65.8km (40.9 miles) ⓘNorth testpits, Taylor Mine, Alberta, Baraga County, Michigan, USA
67.3km (41.8 miles) ⓘUnnamed iron mine, Ford Dam trail, Alberta, Baraga County, Michigan, USA
82.9km (51.5 miles) ⓘChicagon mine, Bates Township, Iron County, Michigan, USA
89.6km (55.7 miles) ⓘCannon Mine (Bengal-Tully Mine), Stambaugh, Iron River, Iron County, Michigan, USA
90.3km (56.1 miles) ⓘHomer-Wauseca Group, Mineral Hills, Iron River, Iron County, Michigan, USA
91.4km (56.8 miles) ⓘHiawatha Group, Stambaugh, Iron River, Iron County, Michigan, USA
References
Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
 
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