Why does meteorite rust?

Iron and stony-iron meteorites are mostly nickel-iron, which oxidizes when it meets moisture and oxygen — the same chemistry as ordinary rust, sped up by the chlorides many meteorites absorbed on Earth. Keeping the metal dry is the single most important thing you can do.

How do I stop my meteorite slice from rusting?

Keep it in a dry environment (ideally with silica gel), handle it with clean dry hands or gloves, avoid humidity and skin oils, and periodically wipe on a thin film of mineral oil, gun oil, or microcrystalline wax to seal the surface.

How do I remove rust from a meteorite?

Catch it early. Gently remove loose orange rust with a soft brass or nylon brush, then dry the piece thoroughly (some collectors warm it gently or use isopropyl alcohol to drive off moisture), and re-oil it. Severe or 'weeping' rust may need a specialist; never soak an iron meteorite in water.

How should I display a meteorite slice?

Use a small easel stand or a sealed display case, keep it out of humid rooms like bathrooms and kitchens, and away from direct salt air. For pallasites, placing a light behind the slice makes the olivine glow. A sealed case with silica gel both protects and presents the piece.

Can I touch my meteorite?

Occasional careful handling is fine, but skin oils and moisture accelerate rust on iron meteorites, so hold slices by the edge, use cotton gloves for regular handling, and wipe the piece down and re-oil it afterwards.

Care Guide

How to Display and Care for a Meteorite Slice

FSThe Falling Stars Collection DeskMeteorite care & aftercare|Updated August 25, 2026|8 min read

An etched iron meteorite slice on display — With a little care, an iron or pallasite slice keeps its pattern and shine for decades.

A meteorite slice will outlast you by billions of years — but only if you keep it dry. Iron and stony-iron meteorites can rust, so a little routine care protects both the metal and the crystal pattern. This guide covers preventing rust, displaying a slice, cleaning it, and the special note for pallasites.

Why meteorite needs care

Most display slices are nickel-iron — solid metal, or metal holding olivine in a pallasite. That metal oxidizes when it meets moisture, and many meteorites absorbed chlorides during their time on Earth that speed the process up. The good news: keep the piece dry and it will stay pristine.

Etched iron meteorite surface showing the Widmanstätten pattern — Keep the etched surface dry and lightly oiled and the Widmanstätten pattern stays crisp.

Preventing rust (the #1 rule)

Keep it dry — store in a low-humidity spot; add silica gel packs to the case or drawer.
Handle clean — hold by the edge, use cotton gloves; skin oils and sweat start rust.
Seal the surface — wipe on a thin film of mineral oil, gun oil, or microcrystalline wax every few weeks to months.
Avoid humid rooms — no bathrooms, kitchens, basements, or salt air.

How to display a slice

Easel stand — shows both the pattern and the shape; easy to admire.
Sealed case with silica gel — the best of both worlds: protection and presentation.
Backlighting — for pallasites, a light behind the slice makes the olivine glow.

Cleaning & light rust removal

Dust with a soft dry brush. If you see early orange spots, remove loose rust gently with a soft brass or nylon brush, dry the piece thoroughly (isopropyl alcohol helps drive off moisture), then re-oil it. Never soak an iron meteorite in water.Persistent “weeping” rust (from internal chlorides) is best handled by a specialist.

Pallasite: a special note

The olivinein a pallasite is stable — it’s the surrounding metal that needs care. Keep the slice dry and oiled around the metal, avoid harsh solvents on the crystals, and a sealed display case works beautifully. Learn more in the pallasite slice guide.

New to specimens? Start with the collector’s guide, or the iron meteorite slice guide. Ready to look? Browse meteorite specimens.

Frequently asked questions

Iron and stony-iron meteorites are mostly nickel-iron, which oxidizes when it meets moisture and oxygen — the same chemistry as ordinary rust, sped up by the chlorides many meteorites absorbed on Earth. Keeping the metal dry is the single most important thing you can do.
Keep it in a dry environment (ideally with silica gel), handle it with clean dry hands or gloves, avoid humidity and skin oils, and periodically wipe on a thin film of mineral oil, gun oil, or microcrystalline wax to seal the surface.
Catch it early. Gently remove loose orange rust with a soft brass or nylon brush, then dry the piece thoroughly (some collectors warm it gently or use isopropyl alcohol to drive off moisture), and re-oil it. Severe or 'weeping' rust may need a specialist; never soak an iron meteorite in water.
Use a small easel stand or a sealed display case, keep it out of humid rooms like bathrooms and kitchens, and away from direct salt air. For pallasites, placing a light behind the slice makes the olivine glow. A sealed case with silica gel both protects and presents the piece.
Occasional careful handling is fine, but skin oils and moisture accelerate rust on iron meteorites, so hold slices by the edge, use cotton gloves for regular handling, and wipe the piece down and re-oil it afterwards.