How to Tell If a Meteorite Is Real: 7 Simple Tests You Can Do at Home

If you have found a rock that looks unusual, or you are holding a piece of jewelry that claims to be made from a meteorite, the first question is always the same: is it actually real? The good news is that most genuine meteorites leave traces you can check without a laboratory. The bad news is that the market is full of lookalikes — hematite, magnetite, and factory slag are routinely sold as "meteorites" to people who cannot tell the difference.

This guide gives you seven practical tests, ordered from the ones you can do at your kitchen table to the ones that need a professional eye. None of them require special equipment.

1. Does a magnet stick to it?

Almost all meteorites contain iron and nickel, so a strong magnet will be attracted to them. But this is only a first filter, not proof. Many Earth rocks — magnetite, hematite, and chunks of man-made slag — are also magnetic. A positive magnet test means "keep looking," not "it's real."

2. Is it surprisingly heavy for its size?

Iron meteorites are roughly 3.5 times denser than ordinary rock. Pick it up and compare the weight to a similar-sized stone from your garden. If it feels noticeably heavy, that is a good sign. If it feels light or average, it is probably not an iron meteorite.

3. Does it have a dark, thin fusion crust?

When a meteorite passes through the atmosphere, the outside melts briefly and forms a dark, glassy rind called a fusion crust. It is usually black or charcoal, and very thin — a millimetre or less. A freshly fallen meteorite has this crust. An old, weathered one may have lost it, so the absence of a crust does not rule a specimen out, but its presence is strong evidence.

4. Are there thumbprint-like dimples called regmaglypts?

As the surface melts during entry, aerodynamic forces carve shallow, rounded hollows that look like a thumb pressed into clay. These are called regmaglypts. They are one of the most recognizable signs of a genuine iron meteorite. Slag and industrial metal rarely form them the same way.

5. The nickel test

Nearly all iron meteorites contain a few percent of nickel — something almost no man-made iron has. A handheld nickel test kit (a few drops of dimethylglyoxime) will turn pink on a genuine iron meteorite. This is the cheapest test that separates real meteorites from most fakes, and it is the one we recommend for buyers.

6. The acid-etch test: the Widmanstätten pattern

Cut a small window, polish it, and etch it with dilute nitric acid, and a genuine iron meteorite will reveal a geometric lattice of intersecting bands — the Widmanstätten pattern. This structure forms over millions of years of extremely slow cooling in the core of a shattered asteroid, and it cannot be produced in a laboratory. No terrestrial iron shows it. If a specimen displays this pattern, it is essentially conclusive proof.

We wrote a full article on this: Reading the Widmanstätten Pattern.

7. When in doubt, buy from a seller who shows the stone

All of the above can be faked well enough to fool an untrained eye. The single most reliable protection is to buy from a seller who photographs the exact piece you will receive, describes its materials honestly, and stands behind it with a return policy. A certificate is a piece of paper; a clear photograph of the real stone, described as it is, is harder to argue with.

The fastest summary

• Magnetic + heavy + dark crust + thumbprint dimples — worth investigating further.
• Nickel test turns pink — likely genuine iron.
• Acid etch reveals Widmanstätten pattern — conclusive.
• Light, non-magnetic, or a uniform factory look — probably not a meteorite.

Every meteorite bead and pendant at STELLAR BONE is cut from an iron meteorite that shows these signatures, and each piece is photographed exactly as it is. Browse the Celestial Bone series to see the patterns for yourself.

For the reference material behind these tests: NASA — Meteors and Meteorites and The Meteoritical Society.