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


Locality type:Mine
Classification
Species:Orthoclase
Formula:K(AlSi3O8)
Comments:Occurs in hornfels.
Colour:Pink.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Orthoclase 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:79629
Long-form Identifier:1:3:79629:5
GUID (UUID V4):0
Nearest other occurrences of Orthoclase
10.2km (6.3 miles) ⓘMargerum Brothers Quarry, West Windsor Township, Mercer County, New Jersey, USA
34.7km (21.5 miles) ⓘFeltville Copper mine, Glenside Park (Feltville), Watchung Reservation, Union County, New Jersey, USA
41.9km (26.1 miles) ⓘMorristown occurrences, Morristown, Morris County, New Jersey, USA
44.1km (27.4 miles) ⓘHartshorn Quarry, Short Hills, Millburn, Essex County, New Jersey, USA
52.2km (32.4 miles) ⓘSwede's Mine (Sweed's Mine), Rockaway Township, Morris County, New Jersey, USA
53.9km (33.5 miles) ⓘRagged Mountain feldspar deposit, Scotts Mountain, Harmony Township, Warren County, New Jersey, USA
55.2km (34.3 miles) ⓘAllen Granite & Construction Co. Quarry, Mount Olive, Morris County, New Jersey, USA
55.7km (34.6 miles) ⓘMt Pleasant, Rockaway Township, Morris County, New Jersey, USA
55.8km (34.7 miles) ⓘAllen Mine, Rockaway Township, Morris County, New Jersey, USA
57.3km (35.6 miles) ⓘTorne Quarry, Powerville, Boonton Township, Morris County, New Jersey, USA
References
Manchester, James G. (1931) The Minerals of New York City and its Environs. Bulletin of the New York Mineralogical Club Vol. 3 (1). New York Mineralogical Clubp.75
 
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