How to Identify Meteorite
Real meteorites are genuinely rare, and roughly 99% of suspected finds turn out to be earthly rocks or slag. This guide walks the tests that separate a true candidate from the impostors — and where to get a real one confirmed.
Quick Facts
- hardness
- ~5–6.5 (varies by type)
- streak
- None to faint gray (not red)
- luster
- Metallic (iron) to dull dark crust
- color
- Dark brown to black fusion crust; metallic interior
- specific Gravity
- 3.3–3.9 (stony) up to 7.8 (iron) — heavy for size
Where to Find It
Anywhere on Earth, but easiest to spot in places with few native dark rocks and slow weathering — deserts, dry lakebeds, and Antarctic ice, where dark meteorites stand out against pale ground. Freshly fallen stones are dark and rounded; most found meteorites are picked up by chance rather than seen falling.
What Meteorite Looks Like
- A thin, dark fusion crust — a matte black-to-brown rind where the outside melted during atmospheric entry. On a fresh fall it looks like a burnt eggshell; on an old find it weathers rusty brown.
- Regmaglypts: shallow, thumbprint-like dimples across the surface, as though pressed into soft clay by hot air during descent.
- Unusual heft — a meteorite feels distinctly heavy for its size because of its metal and dense minerals.
- Bright metallic flecks of iron-nickel visible on a filed or broken face (genuine metal, not the sparkle of mica).
- On a cut stony meteorite, tiny round grains called chondrules — millimeter-scale spheres found in no earthly rock.
- No holes, bubbles, or vesicles. A bubbly, sponge-like texture almost always means slag or volcanic rock, not a meteorite.
- Not layered or water-rounded like a river cobble; meteorites are not sedimentary and are not smoothed by water.
Simple Tests to Confirm It’s Meteorite
You can do these at home with basic tools. They won’t damage a good specimen.
Magnet test (strong neodymium)
Hold a strong neodymium magnet near the specimen. Most meteorites contain iron-nickel metal and will visibly tug or lightly stick. No attraction at all makes a meteorite much less likely — but beware: this is necessary, not sufficient. Plenty of terrestrial rocks, especially magnetite-rich ones, are also strongly magnetic.
Streak test on unglazed porcelain
Drag the specimen across the back of an unglazed ceramic tile. A meteorite leaves no streak or a faint gray one. A rusty red-brown streak points to hematite; a black streak points to magnetite. A colored streak effectively rules a meteorite out.
Density / heft test
Weigh the specimen against an ordinary rock of the same size. Meteorites are noticeably denser and feel too heavy for their size — iron meteorites startlingly so. A rock that feels light and airy for its bulk is almost certainly not from space.
Window test (file a small flat)
Grind a tiny window on an edge with a file or on a coarse stone (a bathroom-tile ring works). Look with a hand lens for bright metallic specks of iron-nickel scattered through the interior. Genuine metal that also responds to a magnet is a strong sign; a uniform gray or crystalline interior with no metal is not.
Fusion crust and regmaglypt inspection
Under good light and a hand lens, check for a thin dark rind that stops at the surface (not colored throughout) and shallow thumbprint dimples. Fusion crust is only a fraction of a millimeter thick — if the dark color goes deep, it is the rock's own color, not a crust.
Not sure if your specimen is Meteorite?
Get an AI-powered first guess from a photo, then use the tests above to confirm.
Look-Alikes & How to Tell the Difference
Magnetite
Strongly magnetic like an iron meteorite, but leaves a black streak and often forms visible octahedral crystals. Meteorites leave no red or black streak and show a fusion crust instead of crystal faces.
Hematite
Can be heavy and metallic-looking, but always leaves a tell-tale reddish-brown streak. Meteorites never streak rusty red.
Industrial slag
The single most common meteor-wrong. Slag is glassy and usually full of holes, bubbles, or flow textures. Meteorites almost never have vesicles.
Iron concretions / hardpan
Rounded iron-cemented lumps that can feel heavy, but they lack fusion crust, show internal layering, and often crumble. Meteorites are solid and un-layered.
Siderite (iron carbonate) and rusty man-made iron
Weathered iron objects and iron-rich minerals rust and can attract a magnet, but show no fusion crust, no regmaglypts, and often a crystalline or fibrous break. Man-made iron may show tool marks or a regular shape.
Frequently Asked Questions
How can I tell if my rock is a meteorite?+
Work through the clues in order: a thin dark fusion crust, thumbprint-like regmaglypts, unusual heft, attraction to a strong magnet, and metal flecks on a filed window with no red or black streak. Any single test can mislead, so a real candidate should pass several. Even then, at-home tests only get you to 'possible' — confirmation requires an expert.
Are all meteorites magnetic?+
Most are, because they carry iron-nickel metal, but not all. Some rare stony meteorites (certain achondrites, including lunar and Martian specimens) contain very little metal and are only weakly magnetic. A weak magnet response alone does not rule a meteorite out, and a strong one does not confirm it — magnetite is strongly magnetic too.
Can an app or photo identify a meteorite?+
A photo tool can flag whether a specimen even looks like a meteorite candidate versus an obvious slag or hematite, which is genuinely useful for filtering. But no photo can confirm a meteorite, because confirmation depends on internal structure and composition — chondrules, metal chemistry, isotopes — that a camera cannot measure. Treat any digital result as a first step, never a verdict.
Why do people say 99% of meteorite finds are not meteorites?+
Because they aren't. Meteorites are rare, and the human eye is drawn to heavy, dark, or metallic rocks — exactly the description of common magnetite, hematite, and industrial slag. Meteorite verification labs report that the overwhelming majority of submissions are these terrestrial 'meteor-wrongs.' Staying skeptical is the correct default.
I think I really found one — what do I do?+
Do the non-destructive tests, photograph it, note exactly where you found it, and contact a university geology or planetary-science department or a recognized meteorite verification service (the Meteoritical Society maintains lists). Do not cut, polish, clean aggressively, or make sale claims based on home tests. Real confirmation is a laboratory judgment, not an app's.
Related identification guides
This field guide is educational. Visual identification and simple at-home tests are helpful first steps, but they are not a certified geological, gemological, or meteorite analysis. Verify valuable, hazardous, or scientifically important finds with a qualified expert.