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Opal from
Francisco Brothers Quarry (Francisco Quarry), Great Notch, Little Falls Township, Passaic Co., New Jersey, USA

Locality type:Quarry
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
References
References:Mins. of NYC & Environs, NY Min. Club (1931), Manchester.
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Francisco Brothers Quarry (Francisco Quarry), Great Notch, Little Falls Township, Passaic Co., New Jersey, USA
Nearest other occurrences of Opal
2.4km (1.5 miles) Upper New Street Quarry (Burger's Quarry), Paterson, Passaic Co., New Jersey, USA
4.3km (2.7 miles) McDowell's Quarry (Osborne and Marsellis Quarry), Upper Montclair, Montclair Township, Essex Co., New Jersey, USA
6.5km (4.0 miles) F.J. Marley Quarry, Verona Township, Essex Co., New Jersey, USA
19.5km (12.1 miles) Summit, Union Co., New Jersey, USA
19.8km (12.3 miles) Pennsylvania Railroad cut, Mt Pleasant, Bergen Hill, Jersey City, Hudson Co., New Jersey, USA
19.9km (12.4 miles) New York - West Shore & Buffalo RR tunnel, Weehawken, Bergen Hill, Hudson Co., New Jersey, USA
22.4km (13.9 miles) 106th Street & Central Park West, Manhattan (New York Co.), New York City, New York, USA
33.9km (21.1 miles) Stirling Brook ("Carnelian Creek"), Warren Township, Somerset Co., New Jersey, USA
34.6km (21.5 miles) Millington Quarry (Morris County Crushed Stone Co. Quarry; Tilcon Quarry), Bernards Township, Somerset Co., New Jersey, USA
35.8km (22.2 miles) Dickerson Mine, Succasunna, Randolph Township, Morris Co., New Jersey, USA
 
Mineral and/or Locality  
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