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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Pyrolusite from
Ahles Mine (Osmun-Robeson Mine; Pequest), Oxford Furnace, Oxford Township, Warren County, New Jersey, USA


Locality type:Mine
Classification
Species:Pyrolusite
Formula:Mn4+O2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view Ahles Mine (Osmun-Robeson Mine; Pequest), Oxford Furnace, Oxford Township, Warren County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:70992
Long-form Identifier:1:3:70992:5
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
19.3km (12.0 miles) ⓘChestnut Hill, Easton, Northampton County, Pennsylvania, USA
19.5km (12.1 miles) ⓘSherrer Quarry, C.K. Williams Quarry complex, Chestnut Hill, Easton, Northampton County, Pennsylvania, USA
22.8km (14.2 miles) ⓘUnnamed manganese mines, Clinton Township, Hunterdon County, New Jersey, USA
31.4km (19.5 miles) ⓘSulphur Hill Mine (Sulfur Hill Mine), Andover Township, Sussex County, New Jersey, USA
35.2km (21.9 miles) ⓘScrub Oaks Mine, Mine Hill, Morris County, New Jersey, USA
44.3km (27.5 miles) ⓘFriedensville Mine, Friedensville, Upper Saucon Township, Lehigh County, Pennsylvania, USA
45.3km (28.1 miles) ⓘChimney Rock Quarry, Bridgewater Township, Somerset County, New Jersey, USA
46.1km (28.6 miles) ⓘMountainville, Salisbury Township, Lehigh County, Pennsylvania, USA
67.2km (41.7 miles) ⓘKibblehouse Quarry, Perkiomenville, Marlborough Township, Montgomery County, Pennsylvania, USA
67.6km (42.0 miles) ⓘFrancisco Brothers Quarry, Great Notch, Little Falls Township, Passaic County, New Jersey, USA
References
The Iron Mines of NJ (1910), Bayley:212.
William Shirley Bayley (1941) Pre-Cambrian geology and mineral resources of the Delaware Water Gap and Easton quadrangles, New Jersey and Pennsylvania. USGS Bulletin 920
 
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