Best spot

Alva: Banded Agate & Moss Agate Rockhounding in Woods County, Oklahoma

Updated July 2026

The gypsum hills and stream gravels of Woods County around Alva yield banded agate, moss agate, chalcedony, and jasper reworked from western Oklahoma formations. The area sits beside Alabaster Caverns, a reminder of the thick gypsum beds that define this part of the state. Northwest Oklahoma's creek and terrace gravels are the region's most reliable source of tumbling-grade agate. Reported finds include banded agate, moss agate, chalcedony, chert, jasper. Below: coordinates, access notes, nearby spots, and trip-planning links.

Alva photos

Public image records connected to this spot or its reported material.

1 photo

Gypsum walls inside Alabaster Caverns State Park near Alva, Woods County, Oklahoma; the caverns and surrounding gypsum beds give the area its name (brightness adjusted)

Quick details

Access: Permission required
County: Woods County
State: Oklahoma
Nearest road: N2445 Road
Postcode: 73717
Coordinates: 36.78419, -98.65512

Geology at Alva

This spot sits on Terrace Deposits, mapped as coarse alluvium and fine alluvium that formed within roughly the last 3 million years. Gravels like these concentrate whatever survives the river: agate, jasper, and other tough silica typically show up as rounded, waxy stones.

Mapped unit: Terrace Deposits
Age: 3 Ma to present (Pleistocene)
Rock types: coarse alluvium and fine alluvium
Elevation: 1,430 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 Alva

Best months: September to June. Typical highs run 95°F in midsummer and 47°F in midwinter, with winter lows near 23°F. Summer heat here is intense, so carry more water than you think you need and work the early morning.

Climate normals: NOAA 1991-2020 monthlies, ALVA 1W station (2 mi away).

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

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 Alva

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 Alva.

Across the state line from Alva

Alva is close enough to the Oklahoma border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Alva FAQ

Where is Alva?+

Alva is in Woods County, Oklahoma, at 36.78419, -98.65512. Nearest road: N2445 Road.

What rocks and minerals can you find at Alva?+

Alva is reported to produce Banded Agate, Moss Agate, Chalcedony, Chert, Jasper.

Is collecting allowed at Alva?+

Permission required before collecting. Requires landowner or agency permission before any collecting. Do not enter without explicit authorization. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Alva?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Alva?+

The most comfortable months at Alva are September to June. Summer heat here is intense, so carry more water than you think you need and work the early morning.

How do I get to Alva?+

Open the directions link to navigate to 36.78419, -98.65512 in Google Maps. The nearest road is N2445 Road.

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