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
Griggstown Mine (Franklin Mine), Griggstown, Franklin Township, Somerset County, New Jersey, USA


08936760017367275147652.jpg
Magnetite

Griggstown Mine, Griggstown, Franklin Township, Somerset County, New Jersey, USA
08936760017367275147652.jpg
Magnetite

Griggstown Mine, Griggstown, Franklin Township, Somerset County, New Jersey, USA
08936760017367275147652.jpg
Magnetite

Griggstown Mine, Griggstown, Franklin Township, Somerset County, New Jersey, 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 Griggstown Mine (Franklin Mine), Griggstown, Franklin Township, Somerset County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:71971
Long-form Identifier:1:3:71971:9
GUID (UUID V4):0
Nearest other occurrences of Magnetite
15.5km (9.6 miles) ⓘRaritan River, Piscataway Township, Middlesex County, New Jersey, USA
21.4km (13.3 miles) ⓘNorth Branch, Branchburg Township, Somerset County, New Jersey, USA
27.4km (17.0 miles) ⓘStirling Brook ("Carnelian Creek"), Warren Township, Somerset County, New Jersey, USA
27.6km (17.2 miles) ⓘMenlo Park Copper Mine (Edison Mine), Menlo Park neighborhood, Edison, Middlesex County, New Jersey, USA
30.4km (18.9 miles) ⓘLarge Mine (Lebanon Mine), Clinton Township, Hunterdon County, New Jersey, USA
33.0km (20.5 miles) ⓘAnnandale Mine, Annandale, Clinton Township, Hunterdon County, New Jersey, USA
33.4km (20.7 miles) ⓘJanes Mine, Mine Mountain, Bernardsville, Somerset County, New Jersey, USA
33.5km (20.8 miles) ⓘBernardsville Mines, Bernardsville, Somerset County, New Jersey, USA
34.5km (21.4 miles) ⓘBurrill Mine, Lower Fairmount, Tewksbury Township, Hunterdon County, New Jersey, USA
34.9km (21.7 miles) ⓘOld Furnace Mine, Clinton Township, Hunterdon County, New Jersey, USA
References
NJ State Geol. Ann. Rpt. (1906):138.
 
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