North Groton: Aquamarine & Beryl Rockhounding in Grafton County, New Hampshire

Updated June 2026

North Groton is a mapped rockhounding spot in Grafton County, New Hampshire. Reported finds include aquamarine, beryl, lazulite, quartz. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Grafton County
State: New Hampshire
Nearest road: Palermo Mine Road
Coordinates: 43.75128, -71.88909

Geology at North Groton

This spot sits on Littleton Formation, Upper unnamed member, mapped as metasedimentary that formed roughly 420 to 395 million years ago. Metamorphic terrain like this typically carries quartz veins and sweats, and weathered crystals tend to end up in the soils and streams below.

Mapped unit: Littleton Formation, Upper unnamed member
Age: 420–395 Ma (Early Devonian)
Rock types: metasedimentary
Elevation: 1,640 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit North Groton

Best months: April to October. Typical highs run 78°F in midsummer and 26°F in midwinter, with winter lows near 3°F.

Climate normals: NOAA 1991-2020 monthlies, WENTWORTH station (8 mi away), adjusted for elevation.

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 North Groton

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 North Groton.

Across the state line from North Groton

North Groton is close enough to the New Hampshire border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

North Groton FAQ

Where is North Groton?+

North Groton is in Grafton County, New Hampshire, at 43.75128, -71.88909. Nearest road: Palermo Mine Road.

What rocks and minerals can you find at North Groton?+

North Groton is reported to produce Aquamarine, Beryl, Lazulite, Quartz.

Is collecting allowed at North Groton?+

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. Always confirm current rules with the managing agency before a trip.

What tools should I bring to North Groton?+

A rock hammer, a small pry bar, gloves, and safety glasses cover most crystal ground. A screen helps in loose pocket soil, and newspaper protects points on the way out.

When is the best time to visit North Groton?+

The most comfortable months at North Groton are April to October.

How do I get to North Groton?+

Open the directions link to navigate to 43.75128, -71.88909 in Google Maps. The nearest road is Palermo Mine Road.

More rockhounding in New Hampshire

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Open North Groton on the map

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