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
Wyndham Mines, Bigrigg, Egremont, Copeland, Cumbria, England, UK


02302380017367447226727.jpg
Pyrolusite

Wyndham Mines, Bigrigg, Egremont, Copeland, Cumbria, England, UK
02302380017367447226727.jpg
Pyrolusite

Wyndham Mines, Bigrigg, Egremont, Copeland, Cumbria, England, UK
08019340017272019512610.jpg
Pyrolusite

Wyndham Mines, Bigrigg, Egremont, Copeland, Cumbria, England, UK
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 Wyndham Mines, Bigrigg, Egremont, Copeland, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:17309
Long-form Identifier:1:3:17309:6
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
0.2km (0.1 miles) ⓘBigrigg Mine, Bigrigg, Egremont, Copeland, Cumbria, England, UK
2.7km (1.7 miles) ⓘFlorence Mine, Egremont, Copeland, Cumbria, England, UK
2.9km (1.8 miles) ⓘCleator Moor Iron Mines, Cleator Moor, Copeland, Cumbria, England, UK
8.6km (5.4 miles) ⓘKelton Quarry, Kirkland, Lamplugh, Copeland, Cumbria, England, UK
24.2km (15.1 miles) ⓘOre Gap, Borrowdale, Allerdale, Cumbria, England, UK
25.6km (15.9 miles) ⓘBrandlehow Mine, Catbells, Borrowdale, Allerdale, Cumbria, England, UK
36.2km (22.5 miles) ⓘBurdell Gill, Coombe Height, Caldbeck, Allerdale, Cumbria, England, UK
36.3km (22.6 miles) ⓘGreenside Mine, Patterdale, Eden, Cumbria, England, UK
36.5km (22.7 miles) ⓘThief Gills, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
36.5km (22.7 miles) ⓘHigher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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