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Sylvanite from
Cold Spring and Red Cloud, Gold Hill Mining District, Boulder Co., Colorado, USA

Classification
Species:Sylvanite
Formula:(Au,Ag)2Te4
Confirmation
Validity:Believed Valid
References
References:U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey Professional Paper 223
Data
Mineral Data:Click here to view Sylvanite data
Locality Data:Click here to view Cold Spring and Red Cloud, Gold Hill Mining District, Boulder Co., Colorado, USA
Nearest other occurrences of Sylvanite
5.8km (3.6 miles) Poorman group, Gold Hill Mining District, Boulder Co., Colorado, USA
6.4km (4.0 miles) American, Gold Hill Mining District, Boulder Co., Colorado, USA
6.4km (4.0 miles) Grand View, Gold Hill Mining District, Boulder Co., Colorado, USA
6.4km (4.0 miles) Interocean Mine, Gold Hill Mining District, Boulder Co., Colorado, USA
7.6km (4.7 miles) Richmond Mine, Gold Hill Mining District, Boulder Co., Colorado, USA
8.2km (5.1 miles) Melvina, Gold Hill Mining District, Boulder Co., Colorado, USA
8.2km (5.1 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 Co., Colorado, USA
8.2km (5.1 miles) Black Cloud, Gold Hill Mining District, Boulder Co., Colorado, USA
8.6km (5.4 miles) Grand Republic Occurrence, Gold Hill Mining District, Boulder Co., Colorado, USA
8.6km (5.4 miles) Logan & Sunbeam Occurrence, Gold Hill Mining District, Boulder Co., Colorado, USA
 
Mineral and/or Locality  
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