Beechgrove: Chalcedony Nodules Rockhounding in Coffee County, Tennessee

Updated June 2026

Beechgrove is a mapped rockhounding spot in Coffee County, Tennessee. Reported finds include chalcedony nodules. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Coffee County
State: Tennessee
Nearest road: Oscar Crowell Road
Postcode: 37183
Coordinates: 35.60821, -86.23153

Geology at Beechgrove

This spot sits on Nashville Group; Bigby-Cannon Limestone and Hermitage Formation, mapped as limestone and calcarenite that formed roughly 485 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: Nashville Group; Bigby-Cannon Limestone and Hermitage Formation
Age: 485–445 Ma (Ordovician)
Rock types: limestone and calcarenite
Elevation: 880 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 Beechgrove

Conditions here are workable year-round, with typical highs from 46°F in winter to 83°F in summer.

Climate normals: NOAA 1991-2020 monthlies, WARTRACE 6E station (5 mi away).

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 Beechgrove

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Chalcedony Nodules Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Beechgrove.

Across the state line from Beechgrove

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

Beechgrove FAQ

Where is Beechgrove?+

Beechgrove is in Coffee County, Tennessee, at 35.60821, -86.23153. Nearest road: Oscar Crowell Road.

What rocks and minerals can you find at Beechgrove?+

Beechgrove is reported to produce Chalcedony Nodules.

Is collecting allowed at Beechgrove?+

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 Beechgrove?+

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 Beechgrove?+

Beechgrove is workable year-round.

How do I get to Beechgrove?+

Open the directions link to navigate to 35.60821, -86.23153 in Google Maps. The nearest road is Oscar Crowell Road.

More rockhounding in Tennessee

See all 59 Tennessee spots →

Open Beechgrove on the map

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