Rockhounding Map & Sites in Texas: 547 Locations for Crystal Hunting, Gem Mining & More
Texas Locations
547 locations found in Texas
Texas has 547 documented rockhounding and rock hunting sites, including locations for Fossil, Agate, and Jasper. Whether you're crystal hunting, gem mining, or mineral collecting, most sites are on public land and free to access. Use the interactive map above to filter by mineral type, location type, and find GPS coordinates for each site.
Last updated: — 547 verified locations
Recommended Gear for Texas
Estwing E3-22P Rock Pick
The industry-standard 22oz geological hammer. One-piece forged steel with shock-reduction grip.
Clear Anti-Fog Safety Glasses (4 Pack)
Adjustable, anti-fog lenses for clear vision in any conditions. About $5 per pair.
Watertight Medical Kit
Compact, waterproof first aid kit with bandages, moleskin, and field essentials.
Southwest Treasure Hunter's Gem and Mineral Guide
Whether you're digging for the first time or are an experienced rockhound or "prospector," with a simple rock hammer and...
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The Best Rockhounding Sites in Texas
The old quicksilver district beside Big Bend. Terlingua’s dumps are documented for cinnabar, calomel, native mercury, and terlinguaite — a mineral first described here — plus pompom agate in the surrounding desert. Mercury minerals are toxic: gloves on, hands washed, specimens sealed.
West Texas agate at its best — moss and plume agate weathering out of the west flank of the Glass Mountains near Alpine. This is ranch country: access runs through landowners, and conditions change year to year.
The Mason County topaz district. Decomposed granite around Streeter is documented for blue and clear topaz, amazonite, and smoky quartz — the source of the state gem. The ground is private ranch land; several ranches in the district run fee digs.
The other half of the topaz district. The granite ranches west of Mason produce the same blue topaz, amazonite, and smoky quartz suite as Streeter. Which ranches open to diggers varies year to year — call ahead before you drive out.
Rio Grande gravel hunting with a twist: alongside agate and jasper, Eagle Pass is one of the few documented amber occurrences in Texas. Work the river terrace gravels; the amber is small, dark, and easy to mistake for chert until you see it against light.
East Texas petrified palmwood country. Creek gravels between Groveton and Trinity produce the dense, dot-patterned palmwood that is the Texas state stone — heavy in the hand, glassy on the fracture, and excellent lapidary rock.
Rockhounding Regions of Texas
| Region | Top sites | What you'll find |
|---|---|---|
| Trans-Pecos / Big Bend country | Terlingua, Glass Mountains, Marfa area | Moss and plume agate, cinnabar and mercury minerals, pompom agate |
| Llano Uplift (Mason County) | Streeter, ranches west of Mason, Llano County | Blue and clear topaz, amazonite, smoky quartz in decomposed granite |
| Rio Grande gravels | Eagle Pass and downstream river terraces | Agate, jasper, petrified wood — and one of the state’s few documented amber occurrences |
| Central Texas fossil belt | Road cuts and creek beds from DFW through Austin to San Antonio | Cretaceous marine fossils — ammonites, echinoids, oysters, shark teeth |
| East Texas | Between Groveton and Trinity, Woodville, Lake Livingston | Petrified palmwood — the state stone — in creek gravels |
What Minerals & Gems Can You Find in Texas?
Texas has 97 documented specimen types across 547 sites. Here are the most commonly reported:
Click on any specimen above to see all locations where it can be found in Texas.
Best Time for Crystal Hunting in Texas
West and South Texas are October-through-April country. Summer in the Trans-Pecos and along the Rio Grande runs to 110°F with no shade; the desert agate fields are genuinely dangerous in July and genuinely pleasant in January.
Hunt gravels after rain, statewide. A hard rain rinses dust off river terraces and creek beds and exposes fresh stone — the first dry day after a storm is the best day in the field, and in East Texas it is the only reliable way to see palmwood against the sand.
The Central Texas fossil belt works year-round: road cuts and creek exposures from Dallas to San Antonio need no season, just recent erosion. Remember the ground rule everywhere — Texas is 97% private land, so permission comes before everything.
Check current weather and road conditions before heading out, especially for remote BLM and Forest Service roads.
Where to Find Topaz in Texas
Texas designated blue topaz as its state gemstone in 1969. The Mason County area of the central Texas Hill Country is the primary source — topaz occurs in the rhyolite (Precambrian) of the Llano Uplift. Crystals are found loose in stream gravels and in pockets within the weathered rhyolite. Colors include colorless, pale blue, and champagne (sherry topaz).
Top sites:
- Mason County ranches — Several ranches offer fee dig access for topaz. Check with the Mason County Chamber of Commerce or local rock shops for current operations.
- Streeter area, Mason County — Topaz in rhyolite outcrops and stream gravels. Private ranch land — fee access.
Texas topaz is typically colorless to pale blue in the rough. Natural blue color is uncommon — most "London Blue" topaz on the market is irradiated. The crystals are orthorhombic prisms with a characteristic basal cleavage (one flat end). Topaz is hardness 8, glassy luster, and heavy for its size. Look for transparent, glassy stones in stream gravel — screen and sort the gravel with a classifier. The Llano Uplift granites and rhyolites also produce garnet, tourmaline, and feldspar.
Where to Find Agate in Texas
Texas produces high-quality agate from multiple regions. West Texas plume agate, Dryhead agate, and the famous Texas "Blue" agate (actually gray-blue chalcedony) come from the volcanic rocks of the Trans-Pecos region. South Texas produces agate from the Rio Grande gravels — the Laredo and Webb County areas produce moss agate and banded agate.
Top sites:
- Alpine/Marfa area, Brewster and Presidio counties — Plume agate, moss agate, and jasper on BLM and ranch land. The volcanic terranes of the Trans-Pecos produce diverse siliceous material.
- Rio Grande gravel bars, Webb/Zapata counties — Agate and jasper in river gravel. Public access at river crossings and recreation areas.
Texas agate is diverse — plume, moss, banded, and scenic varieties from different geological environments. The Trans-Pecos volcanic agate is the most collectible. Wet stones to evaluate patterns — agate is translucent when wet. This is excellent lapidary material. The Big Bend region of west Texas produces the finest agate but is also remote and hot. Carry extra water.
Where to Find Petrified Wood in Texas
Texas has abundant petrified wood, designated as the state stone. The Eocene-age Catahoula and Manning Formations of east Texas produce silicified wood — primarily palmwood (the same formation as Louisiana's palmwood). The Trans-Pecos region produces petrified wood from different source rocks in volcanic terranes.
Top sites:
- Woodville area, Tyler County — Petrified palmwood in the Catahoula Formation. Creek gravels and road cuts. Private land — ask permission.
- Lake Livingston area, Trinity County — Petrified wood in lake shore gravel and surrounding forests.
Texas petrified palmwood shows the characteristic dot pattern (vascular bundles) in cross-section. Colors are brown, tan, red, and gray. The east Texas material is typically excellent lapidary stock — dense, well-silicified, and takes a high polish. Look for dense, heavy stones in creek gravels. Petrified wood is heavier than unsilicified wood and has a glassy fracture.
Texas Rockhounding Laws & Public Land Rules
BLM Land
Texas has very limited BLM land (approximately 10,000 acres — least of any western state). Most land in Texas is private.
National Forests
Sam Houston, Davy Crockett, Angelina, and Sabine National Forests in east Texas allow collecting for personal use. Guadalupe Mountains National Park (NPS, not NF) prohibits collecting.
State Parks
Collecting is prohibited in Texas state parks without written authorization from Texas Parks and Wildlife Department.
Collection Limits
Minimal federal land in Texas. Private land collecting requires landowner permission — which covers the vast majority of the state.
What's Protected
Big Bend National Park prohibits all collecting. Guadalupe Mountains National Park prohibits collecting. Alibates Flint Quarries National Monument (Panhandle) prohibits collecting.
Texas is 97% private land. All collecting requires landowner permission. The Mason County topaz ranches, the Trans-Pecos agate areas, and the east Texas fossil/petrified wood areas are all on private land. Many ranchers allow access with permission or for a fee. Summer in south and west Texas is dangerously hot (110°F+). Carry minimum 1 gallon of water per person per hour of activity in the field.
Official State Rocks, Minerals & Gems of Texas
State Gem
Blue Topaz
State Fossil
Paluxysaurus
Mason County fee-dig ranches for topaz; Dinosaur Valley State Park has trackways.
Gear Checklist for Rock Hunting & Gem Mining in Texas
What you need depends on the terrain and what you are collecting. Here is a general checklist for Texas:
- Rock hammer (3 lb crack hammer for hard rock, geologist's pick for softer material)
- Safety glasses — required any time you swing a hammer
- Chisels — cold chisels for splitting seams and extracting crystals
- Bucket and bags — 5-gallon bucket, zip-lock bags for specimens
- GPS device or phone app — cell service is unreliable at most sites
- 1 gallon of water per person — minimum, more in summer
- Sturdy boots — ankle support for loose talus and mine tailings
- Field guide — a regional mineral identification guide for Texas
Always respect private property, follow Leave No Trace principles, and check current regulations before collecting. On BLM land, the general rule is 25 lbs per day plus one specimen for personal, non-commercial use.
Texas Locations (547)
- 1 mi N of Georgetown, cliffs on Georgetown-Belton roadOther
- 11-T-200Other
- 11-T-72Other
- 146-T-100Other
- 146-T-101Other
- 165-T-13Other
- 165-T-14Other
- 2 mi N of Denison, 1/2 mi E of Denton clay/Kde type locality...Other
- 2 to 3 mi N of Denison, type-locality of Duck Creek limestoneOther
- 3 blocks north of Meadowbrook Country ClubOther
Best Rockhounding Sites in Texas
The standout collecting sites in Texas, each with a full field guide — what you'll find, how to get there, and the rules on the ground.
- Chinati Mts
[2] Most of this range is now Chinati Mountains State Natural Area, a 39,000-acre Texas state park — but as of 2026 it's not generally open. [3] This is a real, well-documented mineral district you currently cannot just drive up and collect at.
- General Area
This location's database name — "General Area" — reflects a real gap: the given coordinates fall in Brewster County, Texas, south of Alpine and north of Big Bend National Park, in the broader Terlingua/Glass Mountains/Needle Peak agate country. This is genuine moss and plume agate ground.
- Ranches W of Mason
[2] This is a legitimate, well-established Texas rockhounding tradition, not a marginal roadside spot — go in expecting a real day of creek-sifting, not a guaranteed haul.
- Terlingua
Terlingua, in Brewster County near Big Bend National Park, was the third-largest mercury-producing district in the United States, with mining running from the mid-1880s through 1947. Cinnabar was the ore; the district is also the type locality for terlinguaite, a rare mercury oxychloride first described here, and it's produced calomel, native mercury, fluorite, and calcite.
- W side of Glass Mountains
The Glass Mountains stretch across Brewster and Pecos counties in West Texas, running roughly from Cathedral Mountain in northern Brewster County to Monument Draw in southern Pecos County, between Fort Stockton and Alpine near US Highway 385. The range is genuinely known for moss and plume agate, plus what's locally called Big Bend pompom agate — the "glass" name comes from the shiny, glass-like look of some of the exposed rock, layered with colorful selenite.
- Along Plum Creek
5 miles north-northeast of Alibates Flint Quarries National Monument. The database lists Alibates Flint as the specimen here, which makes sense given the proximity — Alibates flint is one of the most famous tool-stone materials in North America, quarried by Native Americans for over 13,000 years.
- Babyhead to Miller Mt
Baby Head — spelled "Babyhead" on some maps and in the ghost town's mindat entry — sits about 9 miles north of Llano, Texas on Highway 16, marked by the historic Baby Head Cemetery. The roadcut here is one of the best-known rockhounding stops in the Texas Hill Country: it's the type locality for llanite, a porphyritic rhyolite with distinctive blue quartz and reddish microcline feldspar crystals found nowhere else on Earth.
- Broad area around Bedias
Bedias, in Grimes County, Texas, gave its name to bediasite — the dark, glassy tektite that's the southernmost member of the North American tektite strewn field. These are small pieces of natural glass, formed roughly 34 million years ago when the impact that carved the Chesapeake Bay crater ejected molten debris that fell across what's now Texas.
- Llano county
Llano County sits at the heart of the Llano Uplift, a dome of exposed billion-year-old Precambrian granite, gneiss, and schist in the Texas Hill Country — the geologic source of Texas blue topaz, named the state's official gemstone in 1969, and llanite, a distinctive blue-quartz granite found nowhere else in the world. The Llano River cuts through this uplift, carrying granite, gneiss, schist, garnet, and quartz gravel through the county.
What You Can Find in Texas
Dedicated maps for every mineral with 3+ documented sites in Texas:
Rockhounding clubs in Texas
Connect with a local gem and mineral society — meetings, field trips, lapidary workshops, and annual shows.
Browse Texas clubs →Explore Nearby States
Frequently Asked Questions
Where can I find agates in Texas?
Texas has 30 documented agate locations, concentrated in two zones: the Trans-Pecos around Alpine, Marfa, and the Glass Mountains (moss and plume agate, plus Big Bend pompom agate) and the Rio Grande gravels from Eagle Pass downstream. Nearly all of it is private ranch land — several West Texas ranches run fee hunts.
Where can I go gem hunting in Texas?
Mason County is the gem hunt: blue topaz — the state gem — with amazonite and smoky quartz in the decomposed granite around Streeter and the ranches west of Mason. It is private land, and a handful of ranches in the district open to fee diggers. Texas has 3 documented topaz locations, all in this one granite uplift.
Is there rockhounding near Austin?
Austin sits on the Cretaceous fossil belt — road cuts and creek beds in and around the city produce ammonites, echinoids, and oyster beds. The nearest mineral collecting is the Llano Uplift about 90 miles northwest, where the Mason County ranches produce topaz. Our data lists 547 Texas locations; filter the map above by what you want to find.
Is there free public land to collect on in Texas?
Almost none — Texas is 97% private land and has about 10,000 acres of BLM ground, the least of any western state. The east Texas National Forests (Sam Houston, Davy Crockett, Angelina, Sabine) allow personal-use collecting and are the main free option. Everywhere else, collecting runs on landowner permission or ranch fee digs.
What gems, minerals, and crystals can I find in Texas?
Texas has 97 documented specimen types, including Fossil, Agate, Jasper, Chalcedony, Galena. Use the interactive map above to filter by specimen and see exactly which minerals are reported at each location.
How many rockhounding sites are mapped in Texas?
We have 547 rockhounding sites mapped in Texas with GPS coordinates, access info, and community-reported finds. New locations are added regularly through community submissions.
When is the best time to go crystal hunting in Texas?
Fall, winter, and spring are best for rockhounding in Texas, as summer can be extremely hot. Always check current weather and road conditions before heading out, especially for remote collecting sites.
Where can I go gem mining in Texas?
Texas has 547 mapped locations for gem mining, rock hunting, and mineral collecting. Use the interactive map above to filter by specimen type or location type. Paid dig sites offer a guided experience with tools provided, while public access sites on BLM and Forest Service land are free.
Is rock hunting legal on public land in Texas?
Casual rock hunting and mineral collecting is generally allowed on BLM and National Forest land in Texas for personal, non-commercial use. The standard BLM limit is 25 lbs per day plus one specimen, not to exceed 250 lbs per year. Always verify regulations for specific sites — national parks, monuments, and some state parks prohibit collecting. See the laws section above for Texas-specific rules.
What tools do I need for rockhounding in Texas?
Essential rockhounding tools include a rock hammer, safety glasses, chisels, a 5-gallon bucket, zip-lock bags for specimens, a GPS device or phone app, sturdy boots, and a field guide. For Texas specifically, check the gear checklist section above for terrain-specific recommendations.
⚠️ Always verify current regulations, weather conditions, and access requirements before visiting any location. Information provided is based on community submissions and may not be current or accurate.
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