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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Magnetite from
Esperanza Mine [new], Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA


Locality type:Mine
Classification
Species:Magnetite
Formula:Fe2+Fe23+O4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Magnetite data
Locality Data:Click here to view Esperanza Mine [new], Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:537303
Long-form Identifier:1:3:537303:1
GUID (UUID V4):0
Nearest other occurrences of Magnetite
0.7km (0.5 miles) ⓘSierrita Mine, Batamote Hills, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
2.9km (1.8 miles) ⓘAmargosa placers (Amargosa Arroyo placers; Tinaja Wash placers), Amargosa Arroyo, Continental, Tinaja Hills, Pima County, Arizona, USA
7.5km (4.7 miles) ⓘCopper Queen Mine (Queen Mine), Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
7.8km (4.8 miles) ⓘCopper Glance Mine (Glance Mine), Stevens Mountain, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
8.5km (5.3 miles) ⓘTwin Buttes Mine, Twin Buttes, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
10.7km (6.6 miles) ⓘLena No. 1 - 11 claims, Papago Mining District (Sierrita Mining District), Sierrita Mountains, Pima County, Arizona, USA
12.1km (7.5 miles) ⓘSan Xavier Mine (San Xavier Mine shaft), Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
13.8km (8.6 miles) ⓘMineral Hill Mines (Azurite group; Old Azurite Mine; Copper Glance Mine), Mineral Hill, Mission complex, San Xavier, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
14.0km (8.7 miles) ⓘGold Hill Mine, Stevens Mountain, Papago Mining District (Sierrita Mining District), Sierrita Mountains, Pima County, Arizona, USA
14.0km (8.7 miles) ⓘDaisy Mine (Daisy shaft), Mineral Hill Mines (Azurite group; Old Azurite Mine; Copper Glance Mine), Mineral Hill, Mission complex, San Xavier, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
References
MRDS database Dep. ID file #10039594, MRDS ID #M050391.
Econ Geol (1980) 75:673-683
 
and/or  
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