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
Ore Gap, Borrowdale, Allerdale, Cumbria, England, UK


Locality type:Gap
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 Ore Gap, Borrowdale, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:17303
Long-form Identifier:1:3:17303:2
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
12.4km (7.7 miles) ⓘBrandlehow Mine, Catbells, Borrowdale, Allerdale, Cumbria, England, UK
16.0km (10.0 miles) ⓘGreenside Mine, Patterdale, Eden, Cumbria, England, UK
20.4km (12.7 miles) ⓘKelton Quarry, Kirkland, Lamplugh, Copeland, Cumbria, England, UK
22.5km (14.0 miles) ⓘFlorence Mine, Egremont, Copeland, Cumbria, England, UK
22.6km (14.1 miles) ⓘCleator Moor Iron Mines, Cleator Moor, Copeland, Cumbria, England, UK
24.2km (15.1 miles) ⓘWyndham Mines, Bigrigg, Egremont, Copeland, Cumbria, England, UK
24.3km (15.1 miles) ⓘBigrigg Mine, Bigrigg, Egremont, Copeland, Cumbria, England, UK
26.1km (16.2 miles) ⓘBurdell Gill, Coombe Height, Caldbeck, Allerdale, Cumbria, England, UK
27.2km (16.9 miles) ⓘArm O'Grain, Mungrisdale, Eden, Cumbria, England, UK
27.3km (16.9 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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