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
Engesser Mine (Engesser prospect; Johnnie prospect), Engesser Pass, Tank Mountains Mining District, Tank Mountains, Yuma County, Arizona, USA


Locality type:Mine
Classification
Species:Magnetite
Formula:Fe2+Fe23+O4
Comments:Occurs as a vein mineral.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Magnetite data
Locality Data:Click here to view Engesser Mine (Engesser prospect; Johnnie prospect), Engesser Pass, Tank Mountains Mining District, Tank Mountains, Yuma County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:990683
Long-form Identifier:1:3:990683:9
GUID (UUID V4):0
Nearest other occurrences of Magnetite
18.1km (11.3 miles) ⓘAlonah Mine, La Paz County, Arizona, USA
38.1km (23.7 miles) ⓘOrocopia Schist Subduction Channel, Eagletail Mts (Cemetary Ridge), La Paz County, Arizona, USA
41.5km (25.8 miles) ⓘCollins prospect (Old Collins prospect; Cemetary Ridge prospects), Eagle Tail Mining District, Eagletail Mts (Cemetary Ridge), La Paz County, Arizona, USA
50.1km (31.1 miles) ⓘActinolite prospects (Actinolite Asbestos prospect), Eagle Tail Mining District, Eagletail Mts (Cemetary Ridge), La Paz County, Arizona, USA
54.5km (33.9 miles) ⓘHarquahala Mine, Bonanza and Golden Eagle Mine group, Martin Peak, Salome, La Paz County, Arizona, USA
56.6km (35.2 miles) ⓘQuartzsite deposit, Quartzsite, La Paz County, Arizona, USA
66.9km (41.6 miles) ⓘDome Rock Mountains, La Paz County, Arizona, USA
67.2km (41.7 miles) ⓘFerrar Gulch placers, Ferrar Gulch, Arroyo La Paz, La Paz placers, La Paz Mining District (Weaver Mining District), Dome Rock Mountains, La Paz County, Arizona, USA
68.5km (42.6 miles) ⓘYuma Mine, Ellsworth Mining District, Granite Wash Mountains, La Paz County, Arizona, USA
70.3km (43.7 miles) ⓘLa Paz placers, La Paz Mining District (Weaver Mining District), Dome Rock Mountains, La Paz County, Arizona, USA
References
Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 42, 124-125.
 
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