Stream gravels around Fredericksburg: Almandine Garnet Rockhounding in Gillespie County, Texas

Updated June 2026

Stream gravels around Fredericksburg is a mapped rockhounding spot in Gillespie County, Texas. Reported finds include almandine garnet. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Gillespie County
State: Texas
Nearest road: North Olive Street
Postcode: 78624
Coordinates: 30.27139, -98.85459

Geology at Stream gravels around Fredericksburg

This spot sits on Hensell Sand, mapped as limestone that formed roughly 145 to 100 million years ago. Carbonate rock like this dissolves and weathers readily, so fresh road cuts, quarries, and creek exposures are typically the most productive ground.

Mapped unit: Hensell Sand
Age: 145–100 Ma (Early Cretaceous)
Rock types: limestone
Elevation: 1,660 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 Stream gravels around Fredericksburg

Best months: September to June. Typical highs run 93°F in midsummer and 60°F in midwinter, with winter lows near 34°F.

Climate normals: NOAA 1991-2020 monthlies, FREDERICKSBURG station (4 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.

State guidance last verified: April 1, 2026

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 Stream gravels around Fredericksburg

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

Almandine Garnet Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Stream gravels around Fredericksburg.

Stream gravels around Fredericksburg FAQ

Where is Stream gravels around Fredericksburg?+

Stream gravels around Fredericksburg is in Gillespie County, Texas, at 30.27139, -98.85459. Nearest road: North Olive Street.

What rocks and minerals can you find at Stream gravels around Fredericksburg?+

Stream gravels around Fredericksburg is reported to produce Almandine Garnet.

Is collecting allowed at Stream gravels around Fredericksburg?+

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 Stream gravels around Fredericksburg?+

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 Stream gravels around Fredericksburg?+

The most comfortable months at Stream gravels around Fredericksburg are September to June.

How do I get to Stream gravels around Fredericksburg?+

Open the directions link to navigate to 30.27139, -98.85459 in Google Maps. The nearest road is North Olive Street.

More rockhounding in Texas

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Open Stream gravels around Fredericksburg on the map

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