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While externally similar shapes, these two minerals are very different inside.
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Siegenite from
Orphan Mine (Orphan lode), Grand Canyon Village, Orphan Mining District, Coconino County, Arizona, USA


Locality type:Mine
Classification
Species:Siegenite
Formula:CoNi2S4
Comments:As cores of cubic pyrite crystals with bravoite.
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Bravoite
Pyrite
Data
Mineral Data:Click here to view Siegenite data
Locality Data:Click here to view Orphan Mine (Orphan lode), Grand Canyon Village, Orphan Mining District, Coconino County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:246473
Long-form Identifier:1:3:246473:2
GUID (UUID V4):0
Nearest other occurrences of Siegenite
21.0km (13.0 miles) ⓘPinyon Plain Mine, Tusayan, Francis Mining District, Coconino County, Arizona, USA
81.1km (50.4 miles) ⓘHack Canyon Mine, Hack Canyon, Hack Canyon Mining District, Mohave County, Arizona, USA
References
.
Gornitz, V., et al (1988), Origin of the Orphan Mine breccia pipe uranium deposit, Grand Canyon, AZ, Process Mineralogy VII: Applications to Mineral Benficiation Technology and Mineral Exploration, A.H. Vassiliou, Hausen, D.M., and Carson, D.J.T., editors, The Metallurgical Society, Warrendale, PA: 281-301.
Anthony, John W.; Williams, Sidney A.; Bideaux, Richard A.; Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.). University of Arizona Press.p.371
 
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