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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Quartz from
Columbia Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA


Locality type:Mine
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Columbia Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Data Identifiers
Mindat Occurrence Record ID:1007338
Long-form Identifier:1:3:1007338:8
GUID (UUID V4):0
Nearest other occurrences of Quartz
1.0km (0.6 miles) ⓘSilver Spoon Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
1.0km (0.6 miles) ⓘSilver Reef Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
2.2km (1.3 miles) ⓘKeystone group (Darwin-Keystone; Keystone Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
2.8km (1.8 miles) ⓘChipmunk Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
2.8km (1.8 miles) ⓘDarwin Mining District, Darwin Hills, Inyo County, California, USA
3.2km (2.0 miles) ⓘKingman prospect (Kingman Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
4.4km (2.7 miles) ⓘLane Mine (Sorba Mine), Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
4.5km (2.8 miles) ⓘSanta Ana Mine, Ruona group, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
4.7km (2.9 miles) ⓘJackass Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
4.9km (3.0 miles) ⓘWonder Mine, Ophir Mountain, Darwin Mining District, Darwin Hills, Inyo County, California, USA
References
Knopf, Adolf (1914a), The Darwin silver-lead mining district, California: USGS Bulletin 580: 1-18.
 
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