Guides / meteorites

Meteorite Metal Detector: Do You Need One to Find Them?

October 20, 2026 / 8 min read / By Viral Tandel

Picture it: a wide, dry lake bed, a slow sweep of the coil, and a sudden beep over a dark stone. That is the dream behind every search for a meteorite metal detector. The truth is a bit more complicated, and knowing it first can save you money and a run-in with a ranger.

Why does a metal detector react to meteorites?

Because most meteorites carry real metal. Washington University in St. Louis geochemist Randy Korotev notes that more than 95 percent of meteorites contain iron-nickel metal, which does not occur naturally in Earth rocks. That metal is what a detector notices, and it is why most meteorites attract a cheap magnet.

How much metal there is depends on the type:

The pattern is simple: the less metal a meteorite holds (figures from Korotev's pages), the less there is for a detector to respond to. Achondrites, the group that includes lunar and martian meteorites, are the ones a detector is most likely to miss. Our guide to what a meteorite is explains the types.

Can a metal detector tell a meteorite from junk?

No, and it is the most important thing to know before you buy one. Korotev puts it plainly: a detector might tell a US nickel coin from a penny, but it cannot tell whether a piece of metal or a rock contains enough nickel to be a meteorite. Iron meteorites hold about 5 to 30 percent nickel, while industrial iron usually holds less than 1 percent, and only a chemical analysis can measure the difference.

The shortcuts people try do not fix that. Korotev reports that nickel allergy test kits (the dimethylglyoxime or DMG swab) are so sensitive that they can turn pink on ordinary cast or wrought iron, giving false positives. Handheld X-ray guns at scrap yards, coin shops and jewelers are mostly built to test metals and ores, and he finds their results on rocks are often misleading, though in skilled hands they can help with iron meteorites. For a possible iron meteorite, he recommends a lab analysis for iron, nickel, chromium and manganese.

Meanwhile, most beeps are junk. The photos people send Korotev include hex nuts, machine parts and poured metal, many found with metal detectors. A free field check helps: iron meteorites have no flat sides, right angles or straight lines, and they do not bend or break unless badly rusted.

How do meteorite hunters use detectors and magnets?

The American Meteor Society says meteorite hunters often use metal detectors or very strong magnets attached to a walking stick, and that meteorites have been known to jump out of loose soil when a strong magnet passes over. A magnet on a stick is cheap, light and quick over open ground, while a detector can find metal-rich stones just under the surface.

There is one catch with the magnet cane. A strong rare-earth magnet grabs magnetite-rich Earth rocks too, so treat every pickup as a candidate, not a find. Test it the way Korotev recommends: a weak ceramic fridge magnet should still stick, and a sawn or broken face should show shiny metal grains. Our magnetic rocks guide covers the Earth rocks your cane will collect.

When a meteoroid breaks up in the air, the American Meteor Society explains, its fragments land in a roughly elliptical strewn field a few miles long, with the larger pieces usually farther along. Arizona State University notes that strewn field maps come from private vendors and from scientific articles about particular falls. Expect to be patient: Korotev notes that even experienced hunters can go years between finds.

Where are meteorites found?

Almost always in deserts. Korotev's statistics show that nearly all meteorites are found in deserts, counting Antarctica, where nearly 42,000 have been collected. In the United States, about two thirds of finds come from arid parts of California, Nevada, Arizona, New Mexico, Texas and Kansas.

The American Meteor Society describes the best hunting grounds as open, flat, dry places with a light-colored background, where dark stones stand out. Far from a desert, it suggests freshly plowed fields after rain. Beaches, stream beds, roads and railroads are poor bets, and slag is common there.

Where is it legal to metal detect for meteorites?

Check this before you pack the car. The land manager decides what you may do, and the rules differ a lot:

National parks. Under 36 CFR 2.1, possessing or using a metal detector in a national park is prohibited unless it is broken down and stowed, and removing minerals is prohibited too.

BLM land. The Bureau of Land Management (BLM) manages much of the public land in the West, including a lot of desert. Its rule at 43 CFR 8365.1-5 bans explosive, motorized and mechanical collecting tools but makes an exception for metal detectors. BLM's 2012 meteorite policy, Instruction Memorandum 2012-182, allowed hobby collecting without a permit: surface collection only, up to 10 pounds of meteorites per person per year, for personal use, with no sale or barter.

Developed recreation sites, some national monuments and conservation areas, some wilderness areas and other closed areas were off limits. That memo lists a 2013 expiration date but was still posted on BLM's site when we checked in September 2026, so confirm the current rules with the local field office. Because the policy limits hobby collecting to the surface, ask before you dig for a detector target.

National forests and private land. The Forest Service allows recreational detecting in appropriate places, with shallow holes you fully backfill, but its page does not address meteorites, so ask the ranger district. On private land, get permission first; BLM's meteorite FAQ notes that courts have long held that meteorites belong to the owner of the land surface. Our guide to rock collecting rules covers the rest.

What should you do when the detector finds something?

Work through it in order:

1. Check that you may dig. BLM hobby collecting is surface only, and national forest holes must be shallow and backfilled.
2. Look at the shape. Flat faces, right angles, straight lines or a manufactured look mean junk.
3. Try a cheap magnet and look for a crust. Metal that ignores a fridge magnet is not a meteorite, and a thin, dark skin that is darker than the inside is the best sign of a stony one.
4. Record it, do not clean it. Photograph it in place and save the location. No wire brush, acid, other chemicals or blow torch.

Then run the full set of checks in our hub on how to identify a meteorite, and compare your find with the common look-alikes in meteorite or meteor-wrong.

Which metal detector is best for meteorites?

We do not rank detector models, because we have not tested them side by side, and no detector can identify a meteorite anyway. Any detector responds to metal, none can detect nickel, and a strong magnet on a walking stick works for stones lying on the surface. If you do buy one, practice in your own yard on a small iron object at a few depths, so you learn what a small target sounds like. Our guide to rockhounding tools covers the rest of a sensible field kit.

The takeaway

A metal detector is a helper, not a meteorite finder. It points you to metal, and your magnet, your eyes and eventually a lab decide what that metal is. The RockhoundID app, coming soon, will suggest likely matches from a photo and point out the meteorite checks a photo cannot settle. Pick legal ground, bring water, and enjoy the walk, because most days the desert keeps its meteorites to itself.

The pictures in this guide are AI-generated illustrations of what to look for; real specimens vary, so trust the tests over any picture. RockhoundID guides help you narrow down what you found. They suggest likely candidates, not certain identifications or appraisals. For anything valuable, rare or possibly from space, ask a museum, a university geology department or your state geological survey, and check the collecting rules for the land before you take anything home.