Porcupine Hill Quarry

Porcupine Hill Quarry is a pegmatite locality in Topsham, Sagadahoc County, Maine, part of the Topsham/Brunswick pegmatite field that made this stretch of midcoast Maine one of the state's classic mineral-collecting areas. It has produced almandine garnet, beryl, columbite, fluorapatite, quartz, schorl, and gem-grade green elbaite tourmaline. Ownership records found for this dossier point to a private individual owner rather than a club or public program — treat it the way you'd treat any of Topsham's other privately-held pegmatite quarries (Havey, Trenton, Alice Staples), where access ranges from open-to-collectors to closed depending on the specific owner's current policy.

Topsham, Sagadahoc County, sits just across the Androscoggin River from Brunswick, ME. No specific public parking, trailhead, or address was confirmed for Porcupine Hill Quarry itself.

Pegmatite dump-picking and hard-rock collecting are the standard methods at Topsham-area quarries — general-area inference. No current difficulty rating or best-season note was confirmed for this specific site.

Property records found point to private ownership (a Paul Pinette, per a collector's social-media post) rather than any public program. Nearby Topsham quarries have mixed access — Havey Quarry's owner reportedly still allows mineral collecting, while others in the same pegmatite field are held by a different private owner with less clear public access. Contact the landowner or a Maine mineral club before visiting; don't assume walk-up access.