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While externally similar shapes, these two minerals are very different inside.
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Graphite from
Englemann Mine, Peapack, Peapack and Gladstone Borough, Somerset County, New Jersey, USA


Locality type:Mine
Classification
Species:Graphite
Formula:C
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Graphite data
Locality Data:Click here to view Englemann Mine, Peapack, Peapack and Gladstone Borough, Somerset County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:71885
Long-form Identifier:1:3:71885:3
GUID (UUID V4):0
Nearest other occurrences of Graphite
2.8km (1.7 miles) ⓘUnnamed Graphite prospect, Mendham, Morris County, New Jersey, USA
6.2km (3.9 miles) ⓘChester graphite occurrence, Chester Township, Morris County, New Jersey, USA
7.8km (4.8 miles) ⓘPottersville, Tewksbury Township, Hunterdon County, New Jersey, USA
8.7km (5.4 miles) ⓘBrookside, Mendham Township, Morris County, New Jersey, USA
9.6km (5.9 miles) ⓘLewis Morris Park, Harding Township, Morris County, New Jersey, USA
11.3km (7.0 miles) ⓘFairmount, Washington Township, Morris County, New Jersey, USA
13.8km (8.6 miles) ⓘMorristown occurrences, Morristown, Morris County, New Jersey, USA
22.1km (13.7 miles) ⓘLockwood, Byram Township, Sussex County, New Jersey, USA
22.3km (13.9 miles) ⓘConover farm, High Bridge, High Bridge, Hunterdon County, New Jersey, USA
22.6km (14.0 miles) ⓘAnnandale Graphite Corp. workings, Annandale, Clinton Township, Hunterdon County, New Jersey, USA
References
NJ State Geol. Ann. Rpt. (1879):153-154.
 
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