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
Eagle Mine, Gilman, Gilman Mining District (Battle Mountain Mining District; Red Cliff Mining District), Eagle County, Colorado, 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 Eagle Mine, Gilman, Gilman Mining District (Battle Mountain Mining District; Red Cliff Mining District), Eagle County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:34889
Long-form Identifier:1:3:34889:4
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
1.6km (1.0 miles) ⓘBlack Iron Mine (Eagle No. 2 Mine; Iron Mask), Gilman, Gilman Mining District (Battle Mountain Mining District; Red Cliff Mining District), Eagle County, Colorado, USA
29.5km (18.3 miles) ⓘNorway Lode Occurrence (Norway Lode Manganese Ore), Pollock, Blue River area, Summit County, Colorado, USA
32.5km (20.2 miles) ⓘLittle Pittsburg Mine, Fryer Hill, Leadville, Lake County, Colorado, USA
33.3km (20.7 miles) ⓘEvening Star Mine, Carbonate Hill, Leadville, Lake County, Colorado, USA
33.5km (20.8 miles) ⓘWolftone Mine, Carbonate Hill, Leadville, Lake County, Colorado, USA
34.2km (21.3 miles) ⓘIron Mine, Iron Hill, Lake County, Colorado, USA
34.5km (21.5 miles) ⓘSilver Wave Mine, Iron Hill, Lake County, Colorado, USA
34.6km (21.5 miles) ⓘSilver Cord Mine, Iron Hill, Lake County, Colorado, USA
35.0km (21.7 miles) ⓘLime Mine, California Gulch, Iron Hill, Lake County, Colorado, USA
35.2km (21.8 miles) ⓘSmuggler Mine, California Gulch, Iron Hill, Lake County, Colorado, USA
References
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.pp.13-14
 
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