The Slab: Llanite & Rhyolite Rockhounding in Llano County, Texas
Updated August 2026
The Slab is a mapped rockhounding spot in Llano County, Texas. Reported finds include llanite, rhyolite. Below: coordinates, access notes, nearby spots, and trip-planning links.
Map showing The Slab in Llano County, Texas
Quick details
- Access
- Public area
- County
- Llano County
- State
- Texas
- Nearest road
- Slab Road
- Postcode
- 78639
- Coordinates
- 30.68284, -98.48279
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.
State guidance last verified:
- Texas Parks and Wildlife Department
- Bureau of Economic Geology, Texas geology
- Big Bend National Park, Rules
- Community submissions reviewed against published agency rules
Found at The Slab
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 The Slab.
- Llano countyLlano County, Texas · 5 mi awayTopaz, Zircon
- Llano River at Grenwelge ParkTop pick in TexasLlano County, Texas · 12 mi awayBlue Quartz, Quartz, Almandine Garnet
- Llanite Roadcut on Highway 16Top pick in TexasLlano County, Texas · 17 mi awayLlanite, Blue Quartz
- General AreaLlano County, Texas · 19 mi awayBarite, Serpentine, Soapstone
- Moss Ranch area near Enchanted RockLlano County, Texas · 23 mi awayEpidote, Pink Feldspar, Quartz
- Amethyst Hill on Althaus RanchBlanco County, Texas · 26 mi awayAmethyst, Citrine
- LampasasLampasas County, Texas · 31 mi awayFluorescent Calcite
- Fly Gap Road pegmatitesMason County, Texas · 36 mi awayAmazonite, Feldspar, Smoky Quartz
The Slab FAQ
Where is The Slab?+
What rocks and minerals can you find at The Slab?+
Is collecting allowed at The Slab?+
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More rockhounding in Texas
See all 95 Texas spots →Open The Slab on the map
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