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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Nacrite from
Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA


Locality type:Mining District
Classification
Species:Nacrite
Formula:Al2(Si2O5)(OH)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Nacrite data
Locality Data:Click here to view Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:374181
Long-form Identifier:1:3:374181:8
GUID (UUID V4):0
Localities for Nacrite in this Region
St Peters Dome, Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA
Eureka Shaft, St Peters Dome, Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA
Eureka Tunnel (1-15 pegmatite), St Peters Dome, Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA
Nearest other occurrences of Nacrite
0.1km (0.0 miles) ⓘSt Peters Dome, Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA
0.8km (0.5 miles) ⓘEureka Tunnel (1-15 pegmatite), St Peters Dome, Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA
1.0km (0.6 miles) ⓘEureka Shaft, St Peters Dome, Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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