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 Mary Ann, Menheniot, 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 Mary Ann, Menheniot, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:7448
Long-form Identifier:1:3:7448:3
GUID (UUID V4):0
Nearest other occurrences of Marcasite
3.2km (2.0 miles) ⓘWheal Wrey, Wrey and Ludcott United Mines, St Ive, Cornwall, England, UK
8.3km (5.2 miles) ⓘHerodsfoot Mine (North Herodsfoot Mine), Lanreath, Cornwall, England, UK
11.1km (6.9 miles) ⓘHolmbush Mine, Callington United Mines (incl. Emmens United Mines), Stokeclimsland, Cornwall, England, UK
14.8km (9.2 miles) ⓘHingston Down Quarry, Gunnislake, Calstock, Cornwall, England, UK
16.9km (10.5 miles) ⓘTreburland Manganese Mine (Treburland manganese deposits), Altarnun, Cornwall, England, UK
18.8km (11.7 miles) ⓘGreystone Quarry, Lezant, Cornwall, England, UK
21.8km (13.5 miles) ⓘFowey Consols (incl. Wheal Treasure; Wheal Fortune; Wheal Chance), Tywardreath and Par, Cornwall, England, UK
28.5km (17.7 miles) ⓘWheal Betsy (North Wheal Friendship; Prince Arthur Consols), Mary Tavy, West Devon, Devon, England, UK
32.2km (20.0 miles) ⓘTregardock Mine (Tregarget Mine), Treligga, St Teath, Cornwall, England, UK
37.0km (23.0 miles) ⓘSouth Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK
References
Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.
 
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