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
Penberthy Croft Mine, St Hilary, Cornwall, England, UK


07571520017369527647985.jpg
Gypsum, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
03648780017405268717586.jpg
Gypsum

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
00956840017609231126122.jpg
Gypsum, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
03646870017609231129862.jpg
Gypsum, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
06522160017404190306602.jpg
Gypsum

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
00956840017609231126122.jpg
Gypsum, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
07571520017369527647985.jpg
Gypsum, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
07642750017405268717489.jpg
Gypsum

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
00956840017609231126122.jpg
Gypsum, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
Locality type:Mine
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Beudantite1
Goethite1
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Penberthy Croft Mine, St Hilary, Cornwall, England, UK
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:19225
Long-form Identifier:1:3:19225:9
GUID (UUID V4):0
Nearest other occurrences of Gypsum
4.4km (2.7 miles) ⓘGreat Work Mine (incl. Leeds Mine), Godolphin Cross, Breage, Cornwall, England, UK
6.7km (4.2 miles) ⓘWheal Providence, Providence Mines, Carbis Bay, St Ives, Cornwall, England, UK
13.9km (8.6 miles) ⓘSouth Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
16.9km (10.5 miles) ⓘPenstruthal Mine (Bestruthal Mine; incl. North & South Penstruthal Mines), Lanner, Cornwall, England, UK
18.0km (11.2 miles) ⓘHanging Wall Vein, Geevor Mine, Pendeen, St Just, Cornwall, England, UK
18.1km (11.2 miles) ⓘGeevor Mine, Pendeen, St Just, Cornwall, England, UK
18.7km (11.6 miles) ⓘLevant Mine, Trewellard, St Just, Cornwall, England, UK
19.1km (11.9 miles) ⓘWheal Hazard, Botallack Mine, Botallack, St Just, Cornwall, England, UK
19.1km (11.9 miles) ⓘStamps and Jowl Zawn (Roscommon Cliff), Cliff outcrops, Botallack, St Just, Cornwall, England, UK
20.4km (12.7 miles) ⓘLushington Cove, Porthtowan, St Agnes, Cornwall, England, UK
References
 
and/or  
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