Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Muscovite from
Beryl No. 1 claim, Gold Hill Mining District, Boulder County, Colorado, USA


Locality type:Claim
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Beryl No. 1 claim, Gold Hill Mining District, Boulder County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:743322
Long-form Identifier:1:3:743322:1
GUID (UUID V4):0
Nearest other occurrences of Muscovite
1.7km (1.0 miles) ⓘInterocean Mine, Gold Hill Mining District, Boulder County, Colorado, USA
1.8km (1.1 miles) ⓘWilson beryl prospect, Gold Hill Mining District, Boulder County, Colorado, USA
2.0km (1.2 miles) ⓘNugget Group, Jamestown Mining District, Boulder County, Colorado, USA
3.0km (1.9 miles) ⓘCash Mine, Gold Hill, Gold Hill Mining District, Boulder County, Colorado, USA
3.3km (2.1 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
3.4km (2.1 miles) ⓘBlue Jay Mine, Jamestown, Jamestown Mining District, Boulder County, Colorado, USA
3.8km (2.4 miles) ⓘHill Gulch, Jamestown Mining District, Boulder County, Colorado, USA
4.9km (3.0 miles) ⓘGrand Republic Occurrence, Gold Hill Mining District, Boulder County, Colorado, USA
5.1km (3.1 miles) ⓘBeryl Lode (Lehman mine), Left Hand Creek Mining District, Boulder County, Colorado, USA
5.1km (3.2 miles) ⓘBueno (Buena Group), Jamestown Mining District, Boulder County, Colorado, USA
References
Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227
 
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