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 Maid Decline, Gwennap, Cornwall, England, UK


Locality type:Mine
Classification
Species:Chalcocite
Formula:Cu2S
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcocite data
Locality Data:Click here to view Wheal Maid Decline, Gwennap, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:187294
Long-form Identifier:1:3:187294:1
GUID (UUID V4):0
Nearest other occurrences of Chalcocite
0.2km (0.1 miles) ⓘGreat Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
0.3km (0.2 miles) ⓘWheal Virgin, Great Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
0.3km (0.2 miles) ⓘWest Wheal Virgin, Great Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
0.5km (0.3 miles) ⓘCarharrack Mine, Gwennap, Cornwall, England, UK
0.7km (0.4 miles) ⓘWheal Jewel, Gwennap, Cornwall, England, UK
0.7km (0.5 miles) ⓘWheal Lovelace, Great Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
0.9km (0.6 miles) ⓘEast Wheal Damsel, Carharrack, Cornwall, England, UK
0.9km (0.6 miles) ⓘWheal Unity, Gwennap, Cornwall, England, UK
1.0km (0.6 miles) ⓘPoldory Mine, United Mines (Gwennap United Mines), Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
1.3km (0.8 miles) ⓘWheal Gorland, St Day, Cornwall, England, UK
References
Lapis 11(2), 38 (1986)
 
and/or  
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