Plum Bank Beach — Rockhounding in Lower Connecticut River Valley Planning Region, Connecticut
Updated July 2026
Plum Bank Beach is one of Connecticut's more reliable shoreline spots for surface agate and moonstone, tumbled from glacial outwash and concentrated in the beach gravel by Long Island Sound tides. The Laurentide ice sheet left the material as lag deposits, so the best picking follows low tide and storms rather than any bedrock exposure. It is casual beachcombing, not digging: finds run from pea to walnut sized chalcedony and adularescent feldspar. Reported finds include agate, moonstone. Below: coordinates, access notes, nearby spots, and trip-planning links.
Plum Bank Beach photos
Public image records connected to this spot or its reported material.
Map showing Plum Bank Beach in Lower Connecticut River Valley Planning Region, Connecticut
Quick details
- Access
- Public area
- State
- Connecticut
- Nearest road
- Plum Bank Road
- Postcode
- 06475
- Coordinates
- 41.26477, -72.39004
Land & collecting status
Generally open to casual rockhounding
Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.
Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.
Sources & verification
Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.
Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.
Found at Plum Bank Beach
Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.
Nearby rockhounding spots
Other rockhounding spots within driving distance of Plum Bank Beach.
- CCC QuarryTop pick in ConnecticutLower Connecticut River Valley Planning Region, Connecticut · 15 mi awayBeryl, Aquamarine, Microcline
- Gillette QuarryLower Connecticut River Valley Planning Region, Connecticut · 17 mi awayAmazonite, Aquamarine, Beryl
- Guilford & East HavenTop pick in ConnecticutSouth Central Connecticut Planning Region, Connecticut · 19 mi awayAgate
- Slocum ProspectLower Connecticut River Valley Planning Region, Connecticut · 19 mi awayBeryl, Rose Quartz
- New LondonSoutheastern Connecticut Planning Region, Connecticut · 21 mi awayApatite, Spodumene
- New Haven Traprock QuarrySouth Central Connecticut Planning Region, Connecticut · 22 mi awayAmethyst
- StaffordSoutheastern Connecticut Planning Region, Connecticut · 22 mi awayIron Ore, Limonite, Quartz
- White Rocks QuarryLower Connecticut River Valley Planning Region, Connecticut · 23 mi awayBeryl, Tourmaline
Across the state line from Plum Bank Beach
Plum Bank Beach is close enough to the Connecticut border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.
- WesterlySouth County, Rhode Island · 35 mi awayBeryl
- Moosup RiverProvidence County, Rhode Island · 47 mi awayEpidote, Hornblende, Orthoclase
- West GreenwichKent County, Rhode Island · 48 mi awayAmazonite
- NarragansettSouth County, Rhode Island · 52 mi awayBeryl, Quartz
- Jamestown BridgeNewport County, Rhode Island · 55 mi awayStaurolite
- WarwickKent County, Rhode Island · 58 mi awayCarnelian
Plum Bank Beach FAQ
Why is Plum Bank Beach one of the best rockhounding spots in Connecticut?+
Where is Plum Bank Beach?+
What rocks and minerals can you find at Plum Bank Beach?+
Is collecting allowed at Plum Bank Beach?+
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More rockhounding in Connecticut
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