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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Chalcopyrite from
McFadden Group Mine (Altura; Yankee Fork Mine), Yankee Fork Mining District, Custer County, Idaho, USA


Locality type:Mine
Classification
Species:Chalcopyrite
Formula:CuFeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcopyrite data
Locality Data:Click here to view McFadden Group Mine (Altura; Yankee Fork Mine), Yankee Fork Mining District, Custer County, Idaho, USA
Data Identifiers
Mindat Occurrence Record ID:449205
Long-form Identifier:1:3:449205:4
GUID (UUID V4):0
Nearest other occurrences of Chalcopyrite
0.4km (0.2 miles) ⓘGolden Gate Mine (Accidental; Klondike), Yankee Fork Mining District, Custer County, Idaho, USA
0.6km (0.4 miles) ⓘWhy Not Group Mine (Hidden Treasure; Why Not; Eustace Mountain; Estes Gold; Estes Mountain Montana; Thunderbolt), Yankee Fork Mining District, Custer County, Idaho, USA
0.7km (0.4 miles) ⓘMontana Mine, Yankee Fork Mining District, Custer County, Idaho, USA
1.9km (1.2 miles) ⓘKwajalein Prospect (Halloween Mine), Yankee Fork Mining District, Custer County, Idaho, USA
3.2km (2.0 miles) ⓘGrouse Creek (Bismarck; Grouse Creek Venture; Bismark; Grouse Creek Open Pit; Grouse Creek Project; Grouse Creek Unit; Golden Sunbeam; Golden Sunbeam Mine), Yankee Fork Mining District, Custer County, Idaho, USA
6.8km (4.2 miles) ⓘJulietta Mine, Yankee Fork Mining District, Custer County, Idaho, USA
6.9km (4.3 miles) ⓘCharles Dickens Mine, Yankee Fork Mining District, Custer County, Idaho, USA
7.3km (4.5 miles) ⓘBonanza Mine, Yankee Fork Mining District, Custer County, Idaho, USA
7.5km (4.7 miles) ⓘMorrison Mine (George Washington Mine), Yankee Fork Mining District, Custer County, Idaho, USA
8.6km (5.3 miles) ⓘContinental Mine, Yankee Fork Mining District, Custer County, Idaho, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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