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
Gray Quarry, Hamilton, Hancock County, Illinois, USA


Locality type:Quarry
Classification
Species:Chalcopyrite
Formula:CuFeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcopyrite data
Locality Data:Click here to view Gray Quarry, Hamilton, Hancock County, Illinois, USA
Data Identifiers
Mindat Occurrence Record ID:338772
Long-form Identifier:1:3:338772:6
GUID (UUID V4):0
Nearest other occurrences of Chalcopyrite
6.6km (4.1 miles) ⓘGeode Glen Park, Warsaw, Hancock County, Illinois, USA
19.7km (12.2 miles) ⓘSt. Francisville, Clark County, Missouri, USA
33.8km (21.0 miles) ⓘCessford Quarry, Dallas City, Hancock County, Illinois, USA
38.3km (23.8 miles) ⓘO'Neal Quarry, Plymouth, Hancock County, Illinois, USA
38.5km (23.9 miles) ⓘLa Grange road cut, Lewis County, Missouri, USA
49.8km (30.9 miles) ⓘDurham, Lewis County, Missouri, USA
53.5km (33.3 miles) ⓘEvans coal mine, Lewis County, Missouri, USA
55.7km (34.6 miles) ⓘBear Creek, Vernon area, Van Buren County, Iowa, USA
60.4km (37.6 miles) ⓘCoppers Creek, Vernon area, Van Buren County, Iowa, USA
64.1km (39.9 miles) ⓘMedia Quarry, Media Township, Henderson County, Illinois, USA
References
Garvin, Paul L., Tribbey, E. Gene (2005) The minerals of west-central Illinois. The Mineralogical Record, 36 (5) 421-431
 
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