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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Chalcophyllite from
Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK


Locality type:Mine
Classification
Species:Chalcophyllite
Formula:Cu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcophyllite data
Locality Data:Click here to view Wheal Muttrall, Wheal Gorland, St Day, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:3472
Long-form Identifier:1:3:3472:2
GUID (UUID V4):0
Nearest other occurrences of Chalcophyllite
0.2km (0.1 miles) ⓘWheal Gorland, St Day, Cornwall, England, UK
0.7km (0.5 miles) ⓘWheal Unity, Gwennap, Cornwall, England, UK
0.8km (0.5 miles) ⓘWheal Jewel, Gwennap, Cornwall, England, UK
1.7km (1.1 miles) ⓘCathedral Mine, Busveal, St Day, Cornwall, England, UK
1.8km (1.1 miles) ⓘTing Tang Mine, Carharrack, Cornwall, England, UK
2.2km (1.4 miles) ⓘUnited Mines (Gwennap United Mines), Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
3.1km (1.9 miles) ⓘWheal Sparnon, Redruth, Cornwall, England, UK
3.5km (2.1 miles) ⓘTresavean Mine, Lanner, Lanner, Cornwall, England, UK
4.7km (2.9 miles) ⓘSouth Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
5.1km (3.2 miles) ⓘWheal Ellen (Old Basset Mine), Mawla Lane End, St Agnes, Cornwall, England, UK
References
Phillips, William (1823) An Elementary Introduction to Mineralogy (3rd ed.)
Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.
 
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