Autry Mill Nature Preserve: Corundum Rockhounding in Fulton County, Georgia

Updated June 2026

Autry Mill Nature Preserve is a mapped rockhounding spot in Fulton County, Georgia. Reported finds include corundum. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Fulton County
State: Georgia
Nearest road: Warsaw Trail
Postcode: 30022
Coordinates: 34.02016, -84.23332

Geology at Autry Mill Nature Preserve

This spot sits on Aluminous Schist, mapped as schist that formed roughly 4600 to 250 million years ago. Metamorphic rock like this is where garnet, staurolite, and kyanite typically grow as the rock recrystallizes under heat and pressure.

Mapped unit: Aluminous Schist
Age: 4600–250 Ma (Precambrian to Paleozoic)
Rock types: schist
Elevation: 1,030 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.

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 Autry Mill Nature Preserve

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

Corundum Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Autry Mill Nature Preserve.

Across the state line from Autry Mill Nature Preserve

Autry Mill Nature Preserve 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.

Autry Mill Nature Preserve FAQ

Where is Autry Mill Nature Preserve?+

Autry Mill Nature Preserve is in Fulton County, Georgia, at 34.02016, -84.23332. Nearest road: Warsaw Trail.

What rocks and minerals can you find at Autry Mill Nature Preserve?+

Autry Mill Nature Preserve is reported to produce Corundum.

Is collecting allowed at Autry Mill Nature Preserve?+

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 Autry Mill Nature Preserve?+

A rock hammer, a sieve, and a small shovel work well for garnet-type minerals, which concentrate as resistant grains in soils and creek gravels.

How do I get to Autry Mill Nature Preserve?+

Open the directions link to navigate to 34.02016, -84.23332 in Google Maps. The nearest road is Warsaw Trail.

More rockhounding in Georgia

See all 97 Georgia spots →

Open Autry Mill Nature Preserve on the map

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