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
Copper King Mine (Yeager's Mine), Gold Hill, Gold Hill Mining District, Boulder County, Colorado, 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 Copper King Mine (Yeager's Mine), Gold Hill, Gold Hill Mining District, Boulder County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:34447
Long-form Identifier:1:3:34447:2
GUID (UUID V4):0
Nearest other occurrences of Chalcopyrite
2.1km (1.3 miles) ⓘCorning Tunnel (Cold Spring; Alamakee; St. Joe; Blackhawk; Cash Occurrence), Gold Hill Mining District, Boulder County, Colorado, USA
2.1km (1.3 miles) ⓘSlide Mine, Gold Hill Mining District, Boulder County, Colorado, USA
2.1km (1.3 miles) ⓘCold Springs Group (Times Tunnel; Hoodoo; Horsefal; Haddock; Crown; King; Wolf Tongue; Red Cloud), Gold Hill Mining District, Boulder County, Colorado, USA
2.8km (1.7 miles) ⓘIngram mine (Valley Forge Occurrence; Critic and Railroad Boy; Sunshine; Three Brothers; Atchison; Belle; Golden Eagle; Melvina; Baron; Richmond), Gold Hill Mining District, Boulder County, Colorado, USA
4.1km (2.5 miles) ⓘGrey Eagle Mine, Ward Mining District, Boulder County, Colorado, USA
4.1km (2.6 miles) ⓘEvening Star, Gold Hill Mining District, Boulder County, Colorado, USA
4.3km (2.6 miles) ⓘLittle Johnny Mine (Emancipation group; Home Sweet Home occurrence), Gold Hill, Gold Hill Mining District, Boulder County, Colorado, USA
4.5km (2.8 miles) ⓘBlack Rose mine, Jamestown Mining District, Boulder County, Colorado, USA
5.1km (3.1 miles) ⓘDolly Varden Mine, Sunset, Boulder County, Colorado, USA
5.1km (3.1 miles) ⓘCopper Glance, Sunset, Boulder County, Colorado, USA
References
Rocks & Min.: 22:205.
American Mineralogist 28:257-271
Lovering, T.S., Goddard, E.N. (1950) Geology and ore deposits of the Front Range, Colorado. Professional Paper 223. US Geological Survey doi:10.3133/pp223
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
 
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