# Salt Plains Selenite Dig Area: legal collecting field guide

Canonical page: https://lithomap.app/resources/field-trips/salt-plains-selenite-oklahoma
Last access and rule review: September 18, 2026
Page purpose: Original LithoMap trip-planning reference for an explicitly authorized rock, mineral, or non-dinosaur fossil collecting destination.

## Direct answer

A free, seasonal U.S. Fish and Wildlife Service program for collecting distinctive selenite crystals inside one orange-signed dig area.

## Location and material

- State: Oklahoma
- Area: Salt Plains National Wildlife Refuge
- Category: Mineral collecting
- Collection status: Collecting allowed
- Expected material: Hourglass selenite, Gypsum crystal clusters

## Authorization

The refuge expressly authorizes crystal digging only inside the designated area during the published season. The surrounding salt flats remain closed unless a separate special-use permit applies.

## Access

Use the refuge’s Garvin Road entrance and continue to the orange-marked dig area. The observation deck is outside the seasonal gate, and a restroom is available inside during the dig season.

## Tools, limits, and season

- Tools: A shovel and water may be used. Holes may be no deeper than two feet; carefully loosen crystals by hand and follow the refuge’s unusual instruction not to refill holes because the area is rotated and wildlife uses them.
- Limits: Up to ten pounds of crystals plus one large cluster per person per day. Selling collected crystals is prohibited.
- Season and current status: April 1 through October 15, sunrise to sunset. Outside that window the dig area is closed to protect Whooping Cranes and other wildlife.

## Conditions

- Collect only between the orange boundary signs.
- Keep holes at or below the two-foot maximum.
- Do not fly drones.
- Keep pets leashed and never sell refuge crystals.

## Geology

Selenite is a crystalline form of gypsum that grows just below the salt-encrusted surface.

Iron oxide incorporated during growth produces the distinctive hourglass-shaped brown inclusion.

## Field plan

1. Check the refuge page for active notices.
2. Enter only through the designated gate.
3. Search the surface before digging.
4. Use water sparingly along a shallow hole edge.
5. Dry specimens and rinse salt from the vehicle afterward.

## Safety

- The flats can be intensely hot, bright, and windy.
- Bring drinking water plus separate rinse water.
- Gypsum blades are fragile and can have sharp edges.

## Official sources

- Selenite crystal digging rules — U.S. Fish and Wildlife Service: https://www.fws.gov/refuge/salt-plains/crystal-digging
- Refuge laws and regulations — U.S. Fish and Wildlife Service: https://www.fws.gov/refuge/salt-plains/what-we-do/laws-regulations

This guide is not a permit, reservation, boundary survey, legal opinion, guarantee of access, or promise of a find. Open every official source again before travel. Current signs, closures, permits, claim boundaries, and staff instructions control.