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Summit, Union Co., New Jersey, USA

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Latitude & Longitude (WGS84): 40° 44' North , 74° 21' West
Latitude & Longitude (decimal): 40.7333333333, -74.35
NOTE: These recorded occurrences are questionable. The majority, if not nearly all, of them may actually be occurrences in the Commonwealth set of historical quarries which were actually located in adjacent Springfield Township. Since the city of Summit lies atop the first Watchung Mountain and there were typical excavations to install municipal infrastructure and to accomodate the foundations of structures, it is possible that any number of mineral species could have been encountered in the Watchung Basalt within the city limits; however, specific data in this regard are not available at this time.

See the Mindat file for: Houdaille Quarry (Summit Quarry; Commonwealth Quarry), Springfield, Springfield Township, Union Co., New Jersey, USA [].

Mineral List

24 entries listed. 17 valid minerals.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Manchester, J.G. (1931), The Minerals of New York City & Its Environs, New York Mineralogical Club Bulletin: 3(1): 94.

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