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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Quartz from
Molly Grove mine, Blue Ridge Mining District, Grand County, Colorado, USA


Locality type:Mine
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Molly Grove mine, Blue Ridge Mining District, Grand County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:661507
Long-form Identifier:1:3:661507:9
GUID (UUID V4):0
Nearest other occurrences of Quartz
8.9km (5.5 miles) ⓘBig Four Mine, Heeney, Green Mountain Mining District, Summit County, Colorado, USA
11.5km (7.1 miles) ⓘWilliams Fork agate occurrence, Grand County, Colorado, USA
13.4km (8.3 miles) ⓘTroublesome Creek, Middle Park, Grand County, Colorado, USA
21.2km (13.2 miles) ⓘHot Sulfur Springs, Grand County, Colorado, USA
28.6km (17.8 miles) ⓘBoss Mine (1), North Rock Creek Area, Summit County, Colorado, USA
29.3km (18.2 miles) ⓘWindy Gap, Grand County, Colorado, USA
31.6km (19.6 miles) ⓘMt. Vasquez; St. Louis; Milliken Occurrence, La Plata Mining District (California Mining District), Grand County, Colorado, USA
35.6km (22.1 miles) ⓘWillow Creek, Grand County, Colorado, USA
37.5km (23.3 miles) ⓘBobtail mine, Dailey Mining District (Jones Pass Mining District), Clear Creek County, Colorado, USA
39.5km (24.6 miles) ⓘDoctor Mine, Dailey Mining District (Jones Pass Mining District), Clear Creek County, Colorado, USA
References
Lovering, T.S., Goddard, E.N. (1950) Geology and ore deposits of the Front Range, Colorado. Professional Paper 223. US Geological Survey doi:10.3133/pp223
 
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