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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Tetrahedrite Subgroup from
Corning Tunnel (Cold Spring; Alamakee; St. Joe; Blackhawk; Cash Occurrence), Gold Hill Mining District, Boulder County, Colorado, USA


Locality type:Occurrence
Classification
Species:'Tetrahedrite Subgroup' (not an IMA approved species)
Formula:Cu6(Cu4C22+)Sb4S12S
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tetrahedrite Subgroup data
Locality Data:Click here to view Corning Tunnel (Cold Spring; Alamakee; St. Joe; Blackhawk; Cash Occurrence), Gold Hill Mining District, Boulder County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:662543
Long-form Identifier:1:3:662543:6
GUID (UUID V4):0
Nearest other occurrences of Tetrahedrite Subgroup
0.0km (0.0 miles) ⓘSlide Mine, Gold Hill Mining District, Boulder County, Colorado, USA
1.7km (1.1 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
5.1km (3.2 miles) ⓘPoorman group, Gold Hill Mining District, Boulder County, Colorado, USA
5.8km (3.6 miles) ⓘKatie Mine, Boulder County Tungsten Mining District, Boulder County, Colorado, USA
6.0km (3.8 miles) ⓘDorothy Mine, Boulder County Tungsten Mining District, Boulder County, Colorado, USA
6.6km (4.1 miles) ⓘRip Van Dam, Jamestown Mining District, Boulder County, Colorado, USA
6.9km (4.3 miles) ⓘEmmett Mine, Jamestown, Jamestown Mining District, Boulder County, Colorado, USA
6.9km (4.3 miles) ⓘBuckhorn Mine, Jamestown, Jamestown Mining District, Boulder County, Colorado, USA
7.1km (4.4 miles) ⓘEureka Mine (Eureka Alta), Boulder County Tungsten Mining District, Boulder County, Colorado, USA
7.1km (4.4 miles) ⓘFree Coinage, Sunset, 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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