Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Coloradoite from
Alaska Mine, Crisman, Sugarloaf Mining District, Boulder County, Colorado, USA


Locality type:Mine
Classification
Species:Coloradoite
Formula:HgTe
Confirmation
Validity:Confirmed
Confirmation Methods:Dealer/Collection Label
Data
Mineral Data:Click here to view Coloradoite data
Locality Data:Click here to view Alaska Mine, Crisman, Sugarloaf Mining District, Boulder County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:1568461
Long-form Identifier:1:3:1568461:1
GUID (UUID V4):0
Nearest other occurrences of Coloradoite
2.5km (1.6 miles) ⓘMelvina, Gold Hill Mining District, Boulder County, Colorado, USA
2.5km (1.6 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
2.8km (1.7 miles) ⓘWashburn Mine, Sunshine, Gold Hill Mining District, Boulder County, Colorado, USA
2.8km (1.7 miles) ⓘLast Chance (Gray Copper Emerson; Concord; Forest; Franklin Occurrence), Gold Hill Mining District, Boulder County, Colorado, USA
3.0km (1.9 miles) ⓘRichmond Mine, Gold Hill Mining District, Boulder County, Colorado, USA
3.1km (2.0 miles) ⓘNancy Wood mine (Sugar Loaf; Forest; Pittsburg; Gray Copper), Gold Hill, Gold Hill Mining District, Boulder County, Colorado, USA
3.2km (2.0 miles) ⓘAmerican Mine, Sunshine, Gold Hill Mining District, Boulder County, Colorado, USA
3.6km (2.2 miles) ⓘEmpress Mine & Post Boy Tunnel, Sugarloaf Mining District, Boulder County, Colorado, USA
3.8km (2.4 miles) ⓘEmpress (Sylvan Ute), Boulder County Tungsten Mining District, Boulder County, Colorado, USA
4.3km (2.7 miles) ⓘKingston Mine, Boulder County, Colorado, USA
References
Natural History Museum Vienna collection (catalogued in 1893)
 
and/or  
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