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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Arsenopyrite from
Great Dowgas Mine (St Stephen Tin and Copper Mines), Downderry, St Stephen-in-Brannel, Cornwall, England, UK


Locality type:Mine
Classification
Species:Arsenopyrite
Formula:FeAsS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Arsenopyrite data
Locality Data:Click here to view Great Dowgas Mine (St Stephen Tin and Copper Mines), Downderry, St Stephen-in-Brannel, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:785165
Long-form Identifier:1:3:785165:0
GUID (UUID V4):0
Nearest other occurrences of Arsenopyrite
0.5km (0.3 miles) ⓘEast Wheal Strawberry (Wheal Unanimity), St Austell Consols (incl. Wheal Hawkins), Downderry, St Stephen-in-Brannel, Cornwall, England, UK
0.7km (0.4 miles) ⓘSt Austell Consols (incl. Wheal Hawkins), Downderry, St Stephen-in-Brannel, Cornwall, England, UK
1.5km (0.9 miles) ⓘGreat Hewas United Mines (Great Hewas Consols; Great Hewas Mine; Wheal Hewas; Hewas Downs Mine), Kingsdown Mine (Hewas Water Mine), Sticker, St Ewe, Cornwall, England, UK
2.3km (1.4 miles) ⓘCrowhill Mine (Crow Hill Mine; New Crow Hill Mine; Trevanion Mine), Crow Hill, St Stephen-in-Brannel, Cornwall, England, UK
3.0km (1.9 miles) ⓘSouth Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK
3.3km (2.0 miles) ⓘSouth Polgooth Mine (Wheal Davey; incl. New Hewas Mine), Little Polgooth, St Ewe, Cornwall, England, UK
3.6km (2.2 miles) ⓘBlackpool China Clay Pit, Trewoon, St Mewan, Cornwall, England, UK
4.0km (2.5 miles) ⓘPolgooth Mine (Old Polgooth Mine; Polgooth United Mine; Tregontrees and Old Polgooth Mine), Polgooth, St Mewan, Cornwall, England, UK
4.2km (2.6 miles) ⓘStenna Gwyn Mine (Stennagwyn Mine), Foxhole, St Stephen-in-Brannel, Cornwall, England, UK
7.2km (4.5 miles) ⓘPolmear Mine (incl. South Polmear Mine), Duporth, St Austell Bay, Cornwall, England, UK
References
Jones, W.R. (1925): Tinfields of the World. Mining Publications Ltd. (London), 423 pp.
 
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