Gumlog Mountain: Corundum & Kyanite Rockhounding in Union County, Georgia

Plan your visit

Generally open to casual rockhounding

County

Union County

State

Georgia

Nearest road

Ravencliff Faa Road

Postcode

30582

Coordinates

34.94046, -83.92632

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

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.

Best time to visit Gumlog Mountain

Comfortable months (45 to 90°F highs)

Best months: February to December. Typical highs run 79°F in midsummer and 44°F in midwinter, with winter lows near 20°F.

Climate normals: NOAA 1991-2020 monthlies, BLAIRSVILLE EXP STN station (6 mi away), adjusted for elevation.

Geology at Gumlog Mountain

This spot sits on Biotite Gneiss, mapped as biotite gneiss that formed roughly 4600 to 250 million years ago. Metamorphic belts like this often host pegmatite dikes, the coarse-crystal bodies that typically carry beryl, tourmaline, and sheet mica.

Mapped unit

Biotite Gneiss

Age

4600–250 Ma (Precambrian to Paleozoic)

Rock types

biotite gneiss

Elevation

3,460 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.

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.

• Georgia Environmental Protection Division, Geologic Survey
• Chattahoochee-Oconee National Forests
• Georgia State Parks rules
• Community submissions reviewed against published agency rules