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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Marcasite from
Wheal Unity, Gwennap, Cornwall, England, UK


08473260017857061413188.jpg
Marcasite

Wheal Unity, Gwennap, Cornwall, England, UK
05468760017857950507467.jpg
Marcasite

Wheal Unity, Gwennap, Cornwall, England, UK
08245590017857950516996.jpg
Marcasite

Wheal Unity, Gwennap, Cornwall, England, UK
05468760017857950507467.jpg
Marcasite

Wheal Unity, Gwennap, Cornwall, England, UK
08245590017857950516996.jpg
Marcasite

Wheal Unity, Gwennap, Cornwall, England, UK
05468760017857950507467.jpg
Marcasite

Wheal Unity, Gwennap, Cornwall, England, UK
Locality type:Mine
Classification
Species:Marcasite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Marcasite data
Locality Data:Click here to view Wheal Unity, Gwennap, Cornwall, England, UK
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:7444
Long-form Identifier:1:3:7444:5
GUID (UUID V4):0
Nearest other occurrences of Marcasite
2.2km (1.4 miles) ⓘWheal Friendship, Wheal Andrew, Mount Wellington Mine (Wheal Magpie), Cusgarne, Gwennap, Cornwall, England, UK
2.3km (1.4 miles) ⓘWheal Clifford, United Mines (Gwennap United Mines), Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
2.4km (1.5 miles) ⓘCathedral Mine, Busveal, St Day, Cornwall, England, UK
2.7km (1.7 miles) ⓘMount Wellington Mine (Wheal Magpie), Cusgarne, Gwennap, Cornwall, England, UK
2.9km (1.8 miles) ⓘNangiles Mine (Wheal Nangiles), Chacewater, Cornwall, England, UK
3.3km (2.0 miles) ⓘWheal Concord, East Treskerby Mine, Skinners Bottom, St Agnes, Cornwall, England, UK
3.5km (2.2 miles) ⓘWheal Jane, Kea, Cornwall, England, UK
5.6km (3.5 miles) ⓘWheal Whitfield (North Carn Brea Mine; North Tincroft Mine), Robarts Mine (incl. East Wheal Seton; Wheal Maude), Illogan, Cornwall, England, UK
6.2km (3.9 miles) ⓘCarn Brea Mine, Pool, Carn Brea, Cornwall, England, UK
7.1km (4.4 miles) ⓘTincroft Mine, Pool, Carn Brea, Cornwall, England, UK
References
Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford.
Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.
 
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