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
Liberty Mine, Libertytown, Frederick County, Maryland, USA


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 Liberty Mine, Libertytown, Frederick County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:90037
Long-form Identifier:1:3:90037:5
GUID (UUID V4):0
Nearest other occurrences of Chalcocite
0.8km (0.5 miles) ⓘDolyhyde Mine (Dolly Hyde Mine), Libertytown, Frederick County, Maryland, USA
1.5km (0.9 miles) ⓘHines Prospects, Frederick County, Maryland, USA
1.8km (1.1 miles) ⓘHammond Prospect (Pittinger Prospect), Frederick County, Maryland, USA
3.0km (1.9 miles) ⓘUnionville Mine, Frederick County, Maryland, USA
4.4km (2.7 miles) ⓘRepp Mine, Frederick County, Maryland, USA
7.4km (4.6 miles) ⓘNew London Mine (Linganore Mine), New London, Frederick County, Maryland, USA
10.6km (6.6 miles) ⓘRoop Mine, New Windsor, Carroll County, Maryland, USA
10.9km (6.8 miles) ⓘJohn Diggs Copper Mine, Carroll County, Maryland, USA
11.6km (7.2 miles) ⓘRobert D. Repp Prospect (Portland Cement Company), Carroll County, Maryland, USA
25.0km (15.5 miles) ⓘSpringfield Mine (Mr. Tysons Mine; Sykesville Mine), Sykesville, Carroll County, Maryland, USA
References
Rocks & Min.: 11: 121
21:665
Dana 6: 1071.
 
and/or  
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