Island Mine: Beryl & Aquamarine Rockhounding in Cheshire County, New Hampshire

Updated August 2026

Island Mine is a mapped rockhounding spot in Cheshire County, New Hampshire. Reported finds include beryl, aquamarine, black tourmaline. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Paid / fee dig
County: Cheshire County
State: New Hampshire
Postcode: 03448
Coordinates: 43.07784, -72.27873

Land & collecting status

Pay-to-dig site

This is a fee-dig location. Hours, prices, and what you can keep vary by operator. Call ahead before driving out.

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 Island Mine

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 Island Mine.

Across the state line from Island Mine

Island Mine 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.

Island Mine FAQ

Where is Island Mine?+

Island Mine is in Cheshire County, New Hampshire, at 43.07784, -72.27873.

What rocks and minerals can you find at Island Mine?+

Island Mine is reported to produce Beryl, Aquamarine, Black Tourmaline.

Is collecting allowed at Island Mine?+

Pay-to-dig site. This is a fee-dig location. Hours, prices, and what you can keep vary by operator. Call ahead before driving out. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Island Mine?+

A rock hammer, a pry bar, gloves, and safety glasses suit pegmatite ground. Work weathered zones and check dump piles; coarse crystals often sit in decomposed rock.

How do I get to Island Mine?+

Open the directions link to navigate to 43.07784, -72.27873 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in New Hampshire

See all 43 New Hampshire spots →

Open Island Mine on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.