Vote for your favorite mineral in #MinCup26! - Cuprite vs. Orpiment
It's a fiery match of vibrant red Cuprite and just as saturated orange Orpiment battle for your votes!
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Pyrite from
Keystone Mine, Magnolia Mining District, Boulder County, Colorado, USA


Locality type:Mine
Classification
Species:Pyrite
Formula:FeS2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Sylvanite1
Data
Mineral Data:Click here to view Pyrite data
Locality Data:Click here to view Keystone Mine, Magnolia Mining District, Boulder County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:463583
Long-form Identifier:1:3:463583:3
GUID (UUID V4):0
Nearest other occurrences of Pyrite
0.3km (0.2 miles) ⓘMountain Lion Mine - Keystone vein, Magnolia Mining District, Boulder County, Colorado, USA
0.8km (0.5 miles) ⓘFortune Occurrence, Magnolia Mining District, Boulder County, Colorado, USA
1.1km (0.7 miles) ⓘMagnolia Vein, Kekionga Mine, Magnolia Mining District, Boulder County, Colorado, USA
4.9km (3.0 miles) ⓘYellow Pine, Sugarloaf Mining District, Boulder County, Colorado, USA
5.7km (3.5 miles) ⓘGrand Republic Occurrence, Gold Hill Mining District, Boulder County, Colorado, USA
5.7km (3.5 miles) ⓘPoorman group, Gold Hill Mining District, Boulder County, Colorado, USA
5.7km (3.5 miles) ⓘLogan & Sunbeam Occurrence, Gold Hill Mining District, Boulder County, Colorado, USA
5.8km (3.6 miles) ⓘRogers No. 1; 2; 3-5; 7-11 Occurrence, Boulder County Tungsten Mining District, Boulder County, Colorado, USA
5.8km (3.6 miles) ⓘWood Mountain Group, Gold Hill Mining District, Boulder County, Colorado, USA
6.4km (4.0 miles) ⓘNancy Wood mine (Sugar Loaf; Forest; Pittsburg; Gray Copper), Gold Hill, Gold Hill Mining District, Boulder County, Colorado, USA
References
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.
Missen, O. P., Back, M. E., Mills, S. J., Roberts, A. C., LePage, Y., Pinch, W. W., & Mandarino, J. A. (2021). Crystal Chemistry of Zemannite-Type Structures: III. Keystoneite, the Ni2+-Analogue of Zemannite, and Ferrotellurite Discredited. The Canadian Mineralogist, 59(2), 355-364.
 
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