What your state adds

Less dramatic than the federal layer and not nothing.

State land is its own regime

State trust land, state parks and state forests each have their own collecting rules, and they are not the BLM rules.

Some states permit limited personal collecting on state land, some require a permit, and state parks are usually closed to it in the same way national parks are.

This is the layer people assume follows the federal answer, and it does not.

Business registration

The ordinary items once you are selling: a business registration, a sales tax permit, and a local business license where required.

Sales tax is the one that matters at shows, because a show in another state frequently requires registering there, and show organizers increasingly ask for the number.

Where states add real rules

Specific protected material. Some states protect particular fossils, meteorites or archaeological material, and a few have a state fossil or gemstone with its own rules.

Archaeological resources. Artefacts are a completely different legal regime from minerals, federally and at state level, and collecting them is prohibited in circumstances where collecting rocks is fine.

Cave resources, which are protected in most states.

Chemical disclosure regimes, which reach retail sale of some material into some states.

The practical answer

Register the business, get the sales tax permit, and check the state's own land agency before collecting on state ground.

Ask about a specific parcel rather than reading a general page, which is the same advice as the federal side and for the same reason.

And do not assume an artefact found while collecting minerals is yours. That is a common way a legal collecting trip becomes an illegal one.

References