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
Wheal Clifford, United Mines (Gwennap United Mines), Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK


Locality type:Mine
Classification
Species:Chalcocite
Formula:Cu2S
Comments:Found in the spoil heaps intergrown and partially replacing chalcopyrite.
Habit:Massive
Colour:Dark Grey
Quality for species:Poor for species, only of interest for locality collectors. (#)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcocite data
Locality Data:Click here to view Wheal Clifford, United Mines (Gwennap United Mines), Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:543540
Long-form Identifier:1:3:543540:1
GUID (UUID V4):0
Nearest other occurrences of Chalcocite
0.7km (0.4 miles) ⓘWheal Lovelace, Great Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
1.2km (0.7 miles) ⓘWheal Virgin, Great Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
1.2km (0.8 miles) ⓘGreat Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
1.4km (0.9 miles) ⓘWheal Maid Decline, Gwennap, Cornwall, England, UK
1.6km (1.0 miles) ⓘWest Wheal Virgin, Great Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
1.6km (1.0 miles) ⓘPoldory Mine, United Mines (Gwennap United Mines), Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
1.9km (1.2 miles) ⓘCarharrack Mine, Gwennap, Cornwall, England, UK
2.0km (1.3 miles) ⓘWheal Jewel, Gwennap, Cornwall, England, UK
2.2km (1.4 miles) ⓘEast Wheal Damsel, Carharrack, Cornwall, England, UK
2.3km (1.4 miles) ⓘWheal Unity, Gwennap, Cornwall, England, UK
References
Roger Wedlake collection
 
and/or  
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