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
Geevor Mine, Pendeen, St Just, Cornwall, England, UK


01697880017272037103916.jpg
Gypsum

Geevor Mine, Pendeen, St Just, Cornwall, England, UK
01697880017272037103916.jpg
Gypsum

Geevor Mine, Pendeen, St Just, Cornwall, England, UK
01697880017272037103916.jpg
Gypsum

Geevor Mine, Pendeen, St Just, Cornwall, England, UK
Locality type:Mine
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Johannite1
Devilline1
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Geevor Mine, Pendeen, St Just, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:5906
Long-form Identifier:1:3:5906:0
GUID (UUID V4):0
Localities for Gypsum in this Region
Hanging Wall Vein, Geevor Mine, Pendeen, St Just, Cornwall, England, UK
Nearest other occurrences of Gypsum
0.0km (0.0 miles) ⓘHanging Wall Vein, Geevor Mine, Pendeen, St Just, Cornwall, England, UK
0.6km (0.4 miles) ⓘLevant Mine, Trewellard, St Just, Cornwall, England, UK
1.2km (0.8 miles) ⓘStamps and Jowl Zawn (Roscommon Cliff), Cliff outcrops, Botallack, St Just, Cornwall, England, UK
1.6km (1.0 miles) ⓘWheal Hazard, Botallack Mine, Botallack, St Just, Cornwall, England, UK
15.3km (9.5 miles) ⓘWheal Providence, Providence Mines, Carbis Bay, St Ives, Cornwall, England, UK
18.1km (11.2 miles) ⓘPenberthy Croft Mine, St Hilary, Cornwall, England, UK
22.3km (13.9 miles) ⓘGreat Work Mine (incl. Leeds Mine), Godolphin Cross, Breage, Cornwall, England, UK
29.6km (18.4 miles) ⓘSouth Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
33.6km (20.9 miles) ⓘPenstruthal Mine (Bestruthal Mine; incl. North & South Penstruthal Mines), Lanner, Cornwall, England, UK
34.0km (21.1 miles) ⓘLushington Cove, Porthtowan, St Agnes, Cornwall, England, UK
References
Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.
 
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