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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Agate from
Willow Creek, Grand County, Colorado, USA


Locality type:Creek
Classification
Species:Quartz var: Agate
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Agate data
Locality Data:Click here to view Willow Creek, Grand County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:1040268
Long-form Identifier:1:3:1040268:7
GUID (UUID V4):0
Nearest other occurrences of Agate
15.3km (9.5 miles) ⓘHot Sulfur Springs, Grand County, Colorado, USA
37.4km (23.2 miles) ⓘSpecimen Mountain, Larimer County, Colorado, USA
71.4km (44.4 miles) ⓘNorth Table Mountain, Golden, Golden Mining District, Jefferson County, Colorado, USA
78.1km (48.5 miles) ⓘGreen Mountain, Golden, Golden Mining District, Jefferson County, Colorado, USA
82.2km (51.1 miles) ⓘInspiration Point, Denver 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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