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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Pyrite from
Mound City quarry, Linn County, Kansas, USA


Locality type:Quarry
Classification
Species:Pyrite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrite data
Locality Data:Click here to view Mound City quarry, Linn County, Kansas, USA
Data Identifiers
Mindat Occurrence Record ID:565059
Long-form Identifier:1:3:565059:0
GUID (UUID V4):0
Nearest other occurrences of Pyrite
12.2km (7.6 miles) ⓘJumbo Mine, Linn County, Kansas, USA
42.4km (26.3 miles) ⓘRailroad Quarry, Garnett, Anderson County, Kansas, USA
66.6km (41.4 miles) ⓘRoss Quarry (Bert Ross Quarry), Ottawa, Franklin County, Kansas, USA
86.3km (53.6 miles) ⓘRose dome, Woodson County, Kansas, USA
94.3km (58.6 miles) ⓘMicro-Lite Quarry (Hills Pond Lamproite), Woodson County, Kansas, USA
97.2km (60.4 miles) ⓘSt. Louis S and R. Company Mine, Jasper County, Missouri, USA
97.5km (60.6 miles) ⓘGasho Mine, Jasper County, Missouri, USA
97.6km (60.7 miles) ⓘQuick Seven Mine, Jasper County, Missouri, USA
98.2km (61.0 miles) ⓘBlue Rock Mine, Jasper County, Missouri, USA
98.4km (61.2 miles) ⓘFreehold No.3 Mine, Jasper County, Missouri, USA
References
Econ Geol (1994) 89:1411-1418
 
and/or  
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