BLM Personal-Use Collecting Rules: Rocks, Minerals, and Fossils

Ask ten rockhounds how much you can take from BLM land and most will say "25 pounds a day." That's close enough to keep you out of trouble in some states and wrong in others. The federal regulation itself sets no weight at all.

The Bureau of Land Management administers about 245 million surface acres, mostly in the eleven western states and Alaska. Most of it is open to collecting rocks, mineral specimens, semiprecious gemstones and common invertebrate and plant fossils for personal use, with no permit, fee or registration. That's why places like the Quartzsite desert and Oregon's Succor Creek work as collecting destinations. What "how much" means depends on which BLM state office manages the ground, and this guide explains why.

Why the "25-pound rule" is everywhere

The 25-pound figure is real. It's in federal regulation for petrified wood and, since 2022, for common invertebrate and plant fossils. BLM Arizona and BLM California also use it as their definition of "reasonable" for every kind of rock. Repeated through rockhounding books and websites, it turned into a supposed national rule. Following it will rarely get you into trouble, since it's more cautious than Oregon/Washington's car-trunk standard. But it isn't the law everywhere, and in Arizona it's also a firm cap.

What counts as "personal use"

Personal, or noncommercial, use means collecting for yourself: display, your own lapidary work, teaching, or the enjoyment of finding things. BLM's FAQ defines noncommercial as "the collector is not selling the items for a business or financial gain." The test is intent. If you plan to sell what you collect, you need a permit from the BLM field office, whatever the quantity.

National monuments, wilderness and special areas

BLM national monuments aren't automatically closed. BLM's 2024 FAQ says the public may generally collect reasonable amounts inside them, except material identified as a "monument object" in the proclamation or legislation that created the monument, or restricted by its land use plan or a temporary closure. Individual monuments differ, so check the monument's own rules before you go. (BLM Arizona's older brochure states flatly that collecting in its monuments is prohibited.)

In designated wilderness, BLM says collecting reasonable amounts is generally allowed, but only with non-motorized hand tools and minimal surface disturbance, consistent with the area's management plan. Areas of Critical Environmental Concern and other specially managed areas can be limited or closed by their plans.

Mining claims

An unpatented mining claim gives the claimant the right to the locatable minerals on it, including gemstones. BLM Oregon/Washington advises against collecting on a claim without the claimant's consent, and notes that "not all mining claims can be easily identified in the field." BLM's FAQ lists land with active mining claims among the places where collecting generally isn't allowed. There's a useful wrinkle: BLM Oregon/Washington notes that common collectibles such as chert, petrified wood, obsidian and cinders aren't subject to mining claim location, even though people sometimes stake claims for them anyway.

To check for claims, use BLM's Mineral & Land Records System (MLRS) Research Map at mlrs.blm.gov/s/research-map. It replaced the retired LR2000 database. You can also call the local field office.