Prospect Park Quarry

Prospect Park Quarry, in Passaic County's Prospect Park borough, is one of New Jersey's classic trap-rock zeolite localities — part of the same Watchung Mountains basalt system that produced the state's finest datolite, prehnite, and amethyst specimens.[1][2] The coordinate here lands on North 16th Street in the village of Prospect Park, consistent with the quarry's known location. The catch every collector needs to hear up front: this is industrial land, and public walk-up collecting isn't a legal option. Like nearly every NJ trap-rock quarry, it's either active and fenced for liability reasons or closed and inaccessible without prior arrangement. If you want specimens from here, the realistic path is a club-organized field trip, not a solo trip with a rock hammer.

Prospect Park is a small borough in Passaic County, NJ, along North 16th Street near the quarry site. No public trailhead or parking area is documented — this is not a self-guided destination.

Not available without arrangement. Where access has been granted historically, collecting happens on quarry faces, benches, and waste-rock piles using hand tools (hammer, chisel) to open basalt vugs for zeolite crystals.

Prospect Park Quarry is private industrial land. Active NJ quarries don't allow public access due to liability requirements, and most closed quarries are flooded or fenced.[2] The only reliable legal route in is a supervised, club-organized field trip — groups like the New Jersey Mineralogical Society or North Jersey Mineralogical Society periodically negotiate access with quarry operators.[2] Do not attempt to enter without written landowner permission.