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
Barber's Quarry, Frankford, Philadelphia, Philadelphia County, Pennsylvania, USA


Locality type:Quarry
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 Barber's Quarry, Frankford, Philadelphia, Philadelphia County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:360640
Long-form Identifier:1:3:360640:7
GUID (UUID V4):0
Nearest other occurrences of Magnetite
0.3km (0.2 miles) ⓘWilliam's Quarry, Frankford, Philadelphia, Philadelphia County, Pennsylvania, USA
11.7km (7.3 miles) ⓘWissahickon Valley, Philadelphia, Philadelphia County, Pennsylvania, USA
15.4km (9.5 miles) ⓘPrince's Soapstone Quarry, Lafayette Station, Philadelphia County, Pennsylvania, USA
15.4km (9.6 miles) ⓘGladwyne Quarries, Gladwyne, Lower Merion Township, Montgomery County, Pennsylvania, USA
15.5km (9.6 miles) ⓘLafayette (opposite Lafayette), Lower Merion Township, Montgomery County, Pennsylvania, USA
30.7km (19.1 miles) ⓘWilliamson Trade School, Middletown Township, Delaware County, Pennsylvania, USA
44.2km (27.5 miles) ⓘBrinton's Quarry, Westtown Township, Chester County, Pennsylvania, USA
44.7km (27.8 miles) ⓘBeaver Valley, New Castle County, Delaware, USA
47.2km (29.4 miles) ⓘKibblehouse Quarry, Perkiomenville, Marlborough Township, Montgomery County, Pennsylvania, USA
49.9km (31.0 miles) ⓘSwain's Quarry, Pennsbury Township, Chester County, Pennsylvania, USA
References
Samuel S. Gordon, pg. 229
Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia 255pp.
 
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