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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Sphalerite from
Sherman Mine (Sherman tunnel; Leadville Corporation Mine; Day Mines; Hilltop Mine), Upper Iowa Gulch, Lake County, Colorado, USA


Locality type:Mine
Classification
Species:Sphalerite
Formula:ZnS
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz1
Galena1
Pyrite1
Data
Mineral Data:Click here to view Sphalerite data
Locality Data:Click here to view Sherman Mine (Sherman tunnel; Leadville Corporation Mine; Day Mines; Hilltop Mine), Upper Iowa Gulch, Lake County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:478985
Long-form Identifier:1:3:478985:7
GUID (UUID V4):0
Nearest other occurrences of Sphalerite
0.5km (0.3 miles) ⓘContinental Chief Mine, Dyer Mountain, Horseshoe District, Mosquito Range, Lake County, Colorado, USA
3.8km (2.3 miles) ⓘHellena - Ibex Extension, Lake County, Colorado, USA
4.1km (2.6 miles) ⓘBlack Cloud Mine (Resurrection Mine 0080650339; Yak Tunnel; Leadville Unit; Irene Shaft), Iowa Gulch, Leadville, Lake County, Colorado, USA
4.5km (2.8 miles) ⓘGaribaldi Tunnel, Lake County, Colorado, USA
4.9km (3.0 miles) ⓘSherwood Mine, Alma, Alma Mining District, Park County, Colorado, USA
4.9km (3.0 miles) ⓘChautauquan, Lake County, Colorado, USA
5.0km (3.1 miles) ⓘResurrection Mine (Diamond shaft), Evans Gulch, Lake County, Colorado, USA
5.0km (3.1 miles) ⓘJulia Fisk Mine, Iowa Gulch, Leadville, Lake County, Colorado, USA
5.1km (3.2 miles) ⓘEmily Shaft Hollis Property, Lake County, Colorado, USA
5.1km (3.2 miles) ⓘFirst National Mine, Printer Boy Hill, Leadville, Lake County, Colorado, USA
References
Eckhard D. Stuart collection (visual identification)
 
and/or  
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