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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Chlorite Group from
Green Mountain kimberlite, Boulder County, Colorado, USA


Locality type:Pipe
Classification
Species:'Chlorite Group' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chlorite Group data
Locality Data:Click here to view Green Mountain kimberlite, Boulder County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:491941
Long-form Identifier:1:3:491941:4
GUID (UUID V4):0
Nearest other occurrences of Chlorite Group
8.6km (5.4 miles) ⓘGrand Republic Occurrence, Gold Hill Mining District, Boulder County, Colorado, USA
9.1km (5.6 miles) ⓘEureka Mine (Eureka Alta), Boulder County Tungsten Mining District, Boulder County, Colorado, USA
11.3km (7.0 miles) ⓘCash Mine, Gold Hill, Gold Hill Mining District, Boulder County, Colorado, USA
15.0km (9.3 miles) ⓘCopper Glance, Sunset, Boulder County, Colorado, USA
15.1km (9.4 miles) ⓘBlue Jay Mine, Jamestown, Jamestown Mining District, Boulder County, Colorado, USA
15.1km (9.4 miles) ⓘMena Mine (Hoffmeister Homestead Prospect; Black Judge Shaft), Ralston Buttes Mining District, Jefferson County, Colorado, USA
15.8km (9.8 miles) ⓘMammoth Mine, Boulder County Tungsten Mining District, Boulder County, Colorado, USA
16.2km (10.0 miles) ⓘSchwartzwalder Mine (Ralston Creek Mine), Ralston Buttes Mining District, Jefferson County, Colorado, USA
20.0km (12.4 miles) ⓘSmuggler Mine, Jamestown Mining District, Boulder County, Colorado, USA
23.8km (14.8 miles) ⓘNorth Table Mountain, Golden, Golden Mining District, Jefferson County, Colorado, USA
References
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
 
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