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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Chalcocite from
Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK


Locality type:Mine
Classification
Species:Chalcocite
Formula:Cu2S
Comments:Reported from tin lodes in the deepest part of the mine, together with olivenite (Smyth, Reeks & Rudler, 1864).
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcocite data
Locality Data:Click here to view Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:905975
Long-form Identifier:1:3:905975:7
GUID (UUID V4):0
Nearest other occurrences of Chalcocite
1.7km (1.1 miles) ⓘGunheath China Clay Pit, Stenalees, Treverbyn, Cornwall, England, UK
6.2km (3.9 miles) ⓘWheal Gasson (Wheal Penrose; Wheal Gorgan), Goss Moor, St Dennis, Cornwall, England, UK
6.5km (4.1 miles) ⓘWheal Eliza (Boscundle Mine), Carlyon, Cornwall, England, UK
6.7km (4.2 miles) ⓘNew Fowey Consols, Lanlivery, Cornwall, England, UK
6.8km (4.2 miles) ⓘWest Polmear Mine (Carvath United Mine; Carvath Mine; Wheal Change), St Austell, Cornwall, England, UK
7.8km (4.8 miles) ⓘCrinnis Mine (Great Crinnis Mine; Carlyon Consolidated Mine), Carlyon Bay, Carlyon, Cornwall, England, UK
7.8km (4.9 miles) ⓘFowey Consols (incl. Wheal Treasure; Wheal Fortune; Wheal Chance), Tywardreath and Par, Cornwall, England, UK
7.8km (4.9 miles) ⓘEast Crinnis Mine (incl. Wheal Rowe), South Par Mine, St Blaise, Cornwall, England, UK
8.0km (5.0 miles) ⓘLanescot Mine, Fowey Consols (incl. Wheal Treasure; Wheal Fortune; Wheal Chance), Tywardreath and Par, Cornwall, England, UK
8.1km (5.0 miles) ⓘPembroke Mine, South Par Mine, St Blaise, Cornwall, England, UK
References
Smyth, Warington W.; Reeks, Trenham; Rudler, F. W. (1864) A Catalogue of the Mineral Collections in the Museum of Practical Geology. Museum of Practical Geology.
 
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