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
Old Millclose Mine, South Darley, Derbyshire Dales District, Derbyshire, England, UK


07066230017627303253423.jpg
Gypsum

Old Millclose Mine, South Darley, Derbyshire Dales District, Derbyshire, England, UK
07066230017627303253423.jpg
Gypsum

Old Millclose Mine, South Darley, Derbyshire Dales District, Derbyshire, England, UK
08105730017627055754125.jpg
Gypsum

Old Millclose Mine, South Darley, Derbyshire Dales District, Derbyshire, 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 Old Millclose Mine, South Darley, Derbyshire Dales District, Derbyshire, England, UK
Data Identifiers
Mindat Occurrence Record ID:16308
Long-form Identifier:1:3:16308:0
GUID (UUID V4):0
Nearest other occurrences of Gypsum
4.4km (2.7 miles) ⓘMasson Hill and mines, Matlock, Derbyshire Dales District, Derbyshire, England, UK
5.4km (3.4 miles) ⓘCumberland mine, Matlock, Derbyshire Dales District, Derbyshire, England, UK
5.7km (3.6 miles) ⓘWapping Mine, Matlock Bath, Derbyshire Dales District, Derbyshire, England, UK
7.6km (4.7 miles) ⓘBage Mine, Wirksworth, Derbyshire Dales District, Derbyshire, England, UK
9.5km (5.9 miles) ⓘMilltown Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
9.7km (6.0 miles) ⓘFall Hill Quarry, Milltown, Ashover, North East Derbyshire District, Derbyshire, England, UK
10.5km (6.5 miles) ⓘCrich Quarry (Crich Cliff Quarry; Cliff Quarry), Crich, Amber Valley, Derbyshire, England, UK
12.6km (7.8 miles) ⓘArthurton West Open Pit, Longstone Edge, Great Longstone, Derbyshire Dales District, Derbyshire, England, UK
15.1km (9.4 miles) ⓘGlebe Mine, Eyam, Derbyshire Dales District, Derbyshire, England, UK
16.0km (10.0 miles) ⓘWaterbank Mine, Back of Ecton, Ecton, Wetton, Staffordshire Moorlands, Staffordshire, England, UK
References
Ford, T., Sarjeant, A., Smith, M. (1993) The minerals of the Peak district of Derbyshire. UK Journal of Mines and Minerals 13, Rockbottom Publications. 16-55
Day, Harry (1999) BMS Database, British Micromount Society.
 
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