Cumming: Ruby Rockhounding in Forsyth County, Georgia

Updated June 2026

Cumming is a mapped rockhounding spot in Forsyth County, Georgia. Reported finds include ruby. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Forsyth County
State: Georgia
Nearest road: Estates Path
Postcode: 30040
Coordinates: 34.20073, -84.15746

Geology at Cumming

This spot sits on Biotitic Gneiss / Mica Schist/ Amphibolite, mapped as amphibolite, biotite gneiss, and mica 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: Biotitic Gneiss / Mica Schist/ Amphibolite
Age: 4600–250 Ma (Precambrian to Paleozoic)
Rock types: amphibolite, biotite gneiss, and mica schist
Elevation: 1,130 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 Cumming

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, CUMMING 2N station (3 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 Cumming

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

Ruby Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Cumming.

Across the state line from Cumming

Cumming 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.

Cumming FAQ

Where is Cumming?+

Cumming is in Forsyth County, Georgia, at 34.20073, -84.15746. Nearest road: Estates Path.

What rocks and minerals can you find at Cumming?+

Cumming is reported to produce Ruby.

Is collecting allowed at Cumming?+

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 Cumming?+

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.

When is the best time to visit Cumming?+

Cumming is workable year-round.

How do I get to Cumming?+

Open the directions link to navigate to 34.20073, -84.15746 in Google Maps. The nearest road is Estates Path.

More rockhounding in Georgia

See all 97 Georgia spots →

Open Cumming on the map

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