Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Sericite from
Cold Spring Mine, Boulder County Tungsten Mining District, Boulder County, Colorado, USA


Locality type:Mine
Classification
Species:Muscovite var: Sericite
Formula:KAl2(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sericite data
Locality Data:Click here to view Cold Spring Mine, Boulder County Tungsten Mining District, Boulder County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:662436
Long-form Identifier:1:3:662436:1
GUID (UUID V4):0
Nearest other occurrences of Sericite
5.9km (3.6 miles) ⓘCopper Glance, Sunset, Boulder County, Colorado, USA
7.1km (4.4 miles) ⓘBoulder County Mine, Caribou Mining District, Boulder County, Colorado, USA
9.5km (5.9 miles) ⓘEnterprise Vein Occurrence, Eldora, Caribou Mining District, Boulder County, Colorado, USA
10.0km (6.2 miles) ⓘDorothy Mine, Boulder County Tungsten Mining District, Boulder County, Colorado, USA
10.2km (6.3 miles) ⓘGrand Republic Occurrence, Gold Hill Mining District, Boulder County, Colorado, USA
10.3km (6.4 miles) ⓘKatie Mine, Boulder County Tungsten Mining District, Boulder County, Colorado, USA
11.2km (7.0 miles) ⓘCash Mine, Gold Hill, Gold Hill Mining District, Boulder County, Colorado, USA
11.2km (7.0 miles) ⓘIngram mine (Valley Forge Occurrence; Critic and Railroad Boy; Sunshine; Three Brothers; Atchison; Belle; Golden Eagle; Melvina; Baron; Richmond), Gold Hill Mining District, Boulder County, Colorado, USA
12.9km (8.0 miles) ⓘPoorman group, Gold Hill Mining District, Boulder County, Colorado, USA
13.5km (8.4 miles) ⓘInterocean Mine, Gold Hill Mining District, Boulder 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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