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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Gypsum from
Knothill Mine, Cotehill, Wetheral, City of Carlisle District, Cumbria, England, UK


Locality type:Mine
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Knothill Mine, Cotehill, Wetheral, City of Carlisle District, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:16301
Long-form Identifier:1:3:16301:7
GUID (UUID V4):0
Nearest other occurrences of Gypsum
14.7km (9.1 miles) ⓘLong Meg Mine, Lazonby, Eden, Cumbria, England, UK
20.4km (12.7 miles) ⓘFlusco Quarry, Newbiggin, Greystoke, Eden, Cumbria, England, UK
22.4km (13.9 miles) ⓘCarrock Mine, Mungrisdale, Eden, Cumbria, England, UK
22.9km (14.2 miles) ⓘRoughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
25.9km (16.1 miles) ⓘAcorn Bank Gypsum Mine, Temple Sowerby, Eden, Cumbria, England, UK
27.3km (17.0 miles) ⓘTynebottom Mine, Garrigill, Alston Moor, Eden, Cumbria, England, UK
29.3km (18.2 miles) ⓘNentsberry Haggs Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK
29.7km (18.5 miles) ⓘLongriggs Mine, Long Marton, Eden, Cumbria, England, UK
29.8km (18.5 miles) ⓘStamp Hill Mine, Long Marton, Eden, Cumbria, England, UK
30.4km (18.9 miles) ⓘBrownley Hill Mine (Bloomsberry Horse Level), Nenthead, Alston Moor, Eden, Cumbria, England, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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