Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Pitchblende from
West Calhoun Mine, Calhoun-Wood Mines (Jefferson), Central City Mining District (Central Mining District), Gilpin County, Colorado, USA


Locality type:Mine
Classification
Species:Uraninite var: Pitchblende
Formula:UO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pitchblende data
Locality Data:Click here to view West Calhoun Mine, Calhoun-Wood Mines (Jefferson), Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:665243
Long-form Identifier:1:3:665243:2
GUID (UUID V4):0
Nearest other occurrences of Pitchblende
0.1km (0.1 miles) ⓘTaylor-Leavenworth Mine, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
0.2km (0.1 miles) ⓘCalhoun-Wood Mines (Jefferson), Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
0.3km (0.2 miles) ⓘKirk Mine, Quartz Hill, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
0.9km (0.6 miles) ⓘTelegraph Mine, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
1.2km (0.7 miles) ⓘAyres Shaft, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
1.6km (1.0 miles) ⓘPewabic Occurrence, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
2.3km (1.4 miles) ⓘRara Avis, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
2.3km (1.4 miles) ⓘBuckley Mine, Central City Mining District (Central Mining District), Gilpin County, Colorado, USA
2.3km (1.4 miles) ⓘTwo Sisters occurrence, Eureka Mining District, Gilpin County, Colorado, USA
2.3km (1.4 miles) ⓘSpur Daisy, Eureka Mining District, Gilpin County, Colorado, USA
References
Sims, P.K. (1963) Geology of uranium and associated ore deposits, central part of the Front Range mineral belt, Colorado. Professional Paper 371. US Geological Survey doi:10.3133/pp371
 
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