Summerville: Agate & Chalcedony Rockhounding in Chattooga County, Georgia

Updated June 2026

Summerville is a mapped rockhounding spot in Chattooga County, Georgia. Reported finds include agate, chalcedony, chert, opal. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Chattooga County
State: Georgia
Nearest road: Martha Berry Highway
Postcode: 30747
Coordinates: 34.47021, -85.31702

Geology at Summerville

This spot sits on Knox Group undifferentiated, mapped as dolostone that formed roughly 540 to 445 million years ago. Chert and agate nodules typically form inside carbonate rock like this and weather out as tough, waxy lumps in soils and creek beds.

Mapped unit: Knox Group undifferentiated
Age: 540–445 Ma (Cambrian to Ordovician)
Rock types: dolostone
Elevation: 850 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 Summerville

Conditions here are workable year-round, with typical highs from 51°F in winter to 89°F in summer.

Climate normals: NOAA 1991-2020 monthlies, SUMMERVILLE station (4 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 Summerville

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 Summerville.

Across the state line from Summerville

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

Summerville FAQ

Where is Summerville?+

Summerville is in Chattooga County, Georgia, at 34.47021, -85.31702. Nearest road: Martha Berry Highway.

What rocks and minerals can you find at Summerville?+

Summerville is reported to produce Agate, Chalcedony, Chert, Opal.

Is collecting allowed at Summerville?+

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 Summerville?+

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 Summerville?+

Summerville is workable year-round.

How do I get to Summerville?+

Open the directions link to navigate to 34.47021, -85.31702 in Google Maps. The nearest road is Martha Berry Highway.

More rockhounding in Georgia

See all 97 Georgia spots →

Open Summerville on the map

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