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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
Kirtley Prospect (Kirtly Prospect; Bachelor Mtn), Boulder Creek Mining District, Custer County, Idaho, USA


Locality type:Prospect
Classification
Species:Pyrite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrite data
Locality Data:Click here to view Kirtley Prospect (Kirtly Prospect; Bachelor Mtn), Boulder Creek Mining District, Custer County, Idaho, USA
Data Identifiers
Mindat Occurrence Record ID:448455
Long-form Identifier:1:3:448455:4
GUID (UUID V4):0
Nearest other occurrences of Pyrite
1.5km (0.9 miles) ⓘBaker Lake Prospect (Uncle Jess Deposit), Boulder Creek, East Fork Mining District, Custer County, Idaho, USA
1.9km (1.2 miles) ⓘLittle Boulder Creek Prospect (Baker Lake; Baker Lake Moly Deposit; Little Boulder Creek Moly Deposit; Fuller and Baker; Boulder Creek Molybdenum Deposit), Boulder Creek Mining District, Custer County, Idaho, USA
2.3km (1.4 miles) ⓘBoulder Creek Deposit (Brinton; Castle Peak; Livingston Mine), Boulder Creek Mining District, Custer County, Idaho, USA
7.4km (4.6 miles) ⓘLivingston Mine, Jim Creek, Boulder Creek Mining District, Custer County, Idaho, USA
8.3km (5.1 miles) ⓘConfidence Mine (Lucky Strike), East Fork Mining District, Custer County, Idaho, USA
8.4km (5.2 miles) ⓘShiner Prospect, Fourth Of July Creek Mining District, Custer County, Idaho, USA
8.5km (5.3 miles) ⓘRupert Mine (Fourth of July deposits; FDR), Fourth Of July Creek Area, Unorganized Mining District, Custer County, Idaho, USA
8.6km (5.3 miles) ⓘDeer Trail Mine (Blackman), Obsidian Mining District, Custer County, Idaho, USA
8.6km (5.3 miles) ⓘCrater prospect (G. B. Williams Antimony Mine; Lakeview claims), Boulder Creek Mining District, Custer County, Idaho, USA
8.8km (5.5 miles) ⓘHermit Mine (Native Silver), Boulder Creek Mining District, Custer County, Idaho, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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