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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
Castle Mountain, Castle Mountain Mining District, Meagher County, Montana, USA


Locality type:Mountain
Classification
Species:Pyrite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrite data
Locality Data:Click here to view Castle Mountain, Castle Mountain Mining District, Meagher County, Montana, USA
Data Identifiers
Mindat Occurrence Record ID:496968
Long-form Identifier:1:3:496968:6
GUID (UUID V4):0
Nearest other occurrences of Pyrite
0.8km (0.5 miles) ⓘJudge Mine, Castle Mountain Mining District, Meagher County, Montana, USA
1.2km (0.7 miles) ⓘJumbo Mine, Castle Mountain Mining District, Meagher County, Montana, USA
5.4km (3.4 miles) ⓘCumberland Mine, Castle Mountain Mining District, Meagher County, Montana, USA
27.2km (16.9 miles) ⓘGordon Butte, Meagher County, Montana, USA
35.8km (22.2 miles) ⓘBlack Butte Copper Project, Meagher County, Montana, USA
48.3km (30.0 miles) ⓘNeihart, Neihart Mining District (Montana Mining District), Cascade County, Montana, USA
48.3km (30.0 miles) ⓘBroadwater Mines (Moulton-Broadwater; Silver Belt; Liberty), Neihart Mining District (Montana Mining District), Cascade County, Montana, USA
48.5km (30.1 miles) ⓘBig Seven Mine, Neihart Mining District (Montana Mining District), Cascade County, Montana, USA
48.5km (30.1 miles) ⓘBig Ben Mine, Neihart Mining District (Montana Mining District), Cascade County, Montana, USA
49.1km (30.5 miles) ⓘQueen of the Hills Mine (Queen Mine; O'Brien Mine; Galt; Equator; Equator & Great Western), Neihart Mining District (Montana Mining District), Cascade County, Montana, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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