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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Calcite from
Georgetown-Silver Plume Mining District (Griffith Mining District; Silver Plume Mining District), Clear Creek County, Colorado, USA


Locality type:Mining District
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Georgetown-Silver Plume Mining District (Griffith Mining District; Silver Plume Mining District), Clear Creek County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:358227
Long-form Identifier:1:3:358227:5
GUID (UUID V4):0
Nearest other occurrences of Calcite
0.7km (0.4 miles) ⓘGabanta, Georgetown District, Clear Creek County, Colorado, USA
1.1km (0.7 miles) ⓘPayrock Mine, Illinois Mine, Georgetown District, Clear Creek County, Colorado, USA
1.2km (0.8 miles) ⓘDiamond Mine (Diamond Tunnel), Illinois Mine, Georgetown District, Clear Creek County, Colorado, USA
1.8km (1.1 miles) ⓘBismark Pelican (Pelican - Dives Mine), Georgetown District, Clear Creek County, Colorado, USA
1.9km (1.2 miles) ⓘBurleigh Mine, Illinois Mine, Georgetown District, Clear Creek County, Colorado, USA
1.9km (1.2 miles) ⓘColorado Central mine, Georgetown District, Clear Creek County, Colorado, USA
2.0km (1.3 miles) ⓘMendota Mine, Illinois Mine, Georgetown District, Clear Creek County, Colorado, USA
2.6km (1.6 miles) ⓘSeven-Thirty Mine, Illinois Mine, Georgetown District, Clear Creek County, Colorado, USA
7.3km (4.6 miles) ⓘHoward, Upper Union Mining District, Clear Creek County, Colorado, USA
8.1km (5.0 miles) ⓘNabob Mine (Silver Belt; Baltic; Last Chance; Walt Stemble), Lawson Mining District, Clear Creek County, Colorado, USA
References
USGS PP 223(Lovering,1950)
 
and/or  
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