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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Pyrite from
Great Western Mine (Laguna Western; Black Bart Mine; Tucker lease), Great Western-Mirabel group, Middletown, East Mayacmas Mining District, Lake County, California, USA


Locality type:Mine
Classification
Species:Pyrite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrite data
Locality Data:Click here to view Great Western Mine (Laguna Western; Black Bart Mine; Tucker lease), Great Western-Mirabel group, Middletown, East Mayacmas Mining District, Lake County, California, USA
Data Identifiers
Mindat Occurrence Record ID:328024
Long-form Identifier:1:3:328024:9
GUID (UUID V4):0
Nearest other occurrences of Pyrite
5.9km (3.6 miles) ⓘHelen Mine (Helen Mine group; Dead Broke Mine; American Mine), Castle Rock Springs, East Mayacmas Mining District, Lake County, California, USA
6.1km (3.8 miles) ⓘResearch Mine, Castle Rock Springs, East Mayacmas Mining District, Lake County, California, USA
7.3km (4.5 miles) ⓘCinnabar King group, Castle Rock Springs area, West Mayacmas Mining District, Sonoma County, California, USA
8.5km (5.3 miles) ⓘAnderson Springs Mine, Cobb, East Mayacmas Mining District, Lake County, California, USA
10.0km (6.2 miles) ⓘCorona Mines (Vallejo Mines), Twin Peaks, Calistoga, Napa County, California, USA
10.9km (6.8 miles) ⓘOat Hill Mines, Aetna Springs, East Mayacmas Mining District, Napa County, California, USA
11.4km (7.1 miles) ⓘSocrates Mine, Castle Rock Springs area, West Mayacmas Mining District, Sonoma County, California, USA
11.5km (7.1 miles) ⓘOat Hill Extension Mine (Anderson Mine), Aetna Springs, East Mayacmas Mining District, Napa County, California, USA
12.3km (7.6 miles) ⓘIvanhoe Mine (Mount St. Helena Mine; Patten Mine), Calistoga Hot Springs, Napa County, California, USA
12.7km (7.9 miles) ⓘGranada Mine (Switzer Mine; Toyon Mine), Aetna Springs, East Mayacmas Mining District, Napa County, California, USA
References
Emmons, S. F., Becker, G. F. (1885) Statistics and Technology of the Precious Metals. Bureau of the Census.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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