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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Gneiss from
Langford Iron Mine (Trail Creek Iron Mine), Iron Mountain Area, Larimer County, Colorado, USA


Locality type:Mine
Classification
Type:Gneiss
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gneiss data
Locality Data:Click here to view Langford Iron Mine (Trail Creek Iron Mine), Iron Mountain Area, Larimer County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:1046551
Long-form Identifier:1:3:1046551:6
GUID (UUID V4):0
Nearest other occurrences of Gneiss
3.8km (2.3 miles) ⓘAkney Mine, Iron Mountain Area, Larimer County, Colorado, USA
9.9km (6.2 miles) ⓘLangford Copper Mine, Prairie Divide Mining District (St. Cloud Mining District), Larimer County, Colorado, USA
21.0km (13.1 miles) ⓘGold Coin Mine (Companion Lode; Camp Bird; Juniper; Dolly Gere; Unpatented Claims: Gold Coin; Am Erican Eagle; Aspen; Gaskosaga), Manhattan Mining District, Larimer County, Colorado, USA
21.8km (13.5 miles) ⓘBear Cat Prospect, Manhattan Mining District, Larimer County, Colorado, USA
21.8km (13.6 miles) ⓘSodom Mine (Shiny Lo De; Spring Load; Unpatented Claims: Dixie Nos. 1; 2; 4; 6; Basic Load; Monzonite; Dixie Group; Standard), Manhattan Mining District, Larimer County, Colorado, USA
22.2km (13.8 miles) ⓘFree Gold Mine (Silver Dollar; Big Horn No. 1; Copper Butte; Gold Spark; Lancaster; MS 17457), Manhattan Mining District, Larimer County, Colorado, USA
23.3km (14.5 miles) ⓘRockfield Mine (Valentine Lode; Unpatented Claims: Rodkfield; Pendergast Tunnel; Matchless Nos. 1 and 2), Manhattan Mining District, Larimer County, Colorado, USA
24.1km (15.0 miles) ⓘCash Mine (Unpatented Claims: Cash Nos. 1-5; Martin Nos. 1-2), Manhattan Mining District, Larimer County, Colorado, USA
25.5km (15.9 miles) ⓘMayesville Mining District, Larimer County, Colorado, USA
26.1km (16.2 miles) ⓘCopper - Nickel - Laterite - Silver - Gold Prospect (MRDS - 10013869), Mayesville Mining District, Larimer County, Colorado, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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