Cumberland Hill: Agate & Chalcedony Rockhounding in Providence County, Rhode Island

Updated June 2026

Cumberland Hill is a mapped rockhounding spot in Providence County, Rhode Island. Reported finds include agate, chalcedony, jasper, quartz. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Providence County
State: Rhode Island
Nearest road: Woonsocket Industrial Highway
Postcode: 02838
Coordinates: 41.98034, -71.48560

Geology at Cumberland Hill

This spot sits on Esmond Igneous Suite - granite, mapped as granite that formed roughly 635 to 540 million years ago. Plutonic rock like this weathers slowly into grus and boulders, and the most productive collecting is typically in weathered zones and drainages.

Mapped unit: Esmond Igneous Suite - granite
Age: 635–540 Ma (Neoproterozoic)
Rock types: granite
Elevation: 140 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 Cumberland Hill

Best months: March to November. Typical highs run 85°F in midsummer and 39°F in midwinter, with winter lows near 20°F.

Climate normals: NOAA 1991-2020 monthlies, WOONSOCKET station (1 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 Cumberland Hill

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 Cumberland Hill.

Across the state line from Cumberland Hill

Cumberland Hill is close enough to the Rhode Island border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Cumberland Hill FAQ

Where is Cumberland Hill?+

Cumberland Hill is in Providence County, Rhode Island, at 41.98034, -71.48560. Nearest road: Woonsocket Industrial Highway.

What rocks and minerals can you find at Cumberland Hill?+

Cumberland Hill is reported to produce Agate, Chalcedony, Jasper, Quartz.

Is collecting allowed at Cumberland Hill?+

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 Cumberland Hill?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Cumberland Hill?+

The most comfortable months at Cumberland Hill are March to November.

How do I get to Cumberland Hill?+

Open the directions link to navigate to 41.98034, -71.48560 in Google Maps. The nearest road is Woonsocket Industrial Highway.

More rockhounding in Rhode Island

See all 17 Rhode Island spots →

Open Cumberland Hill on the map

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