Your meteorite has traveled an extraordinary distance and survived billions of years in space. With proper care, it can remain a treasured part of your collection for generations.

 

Although meteorites are remarkably durable, they aren’t indestructible. Moisture, improper handling, and unsuitable storage conditions can cause deterioration, particularly in meteorites containing metallic iron.

 

Fortunately, caring for most meteorites is relatively simple. Follow the recommendations below to keep your specimen in excellent condition.

 

Caring for Stone Meteorites

 

Stone meteorites are the most common type of meteorite found on Earth. They consist primarily of silicate minerals, although many contain small amounts of metallic iron.

Most stone meteorites are relatively stable and can be stored in the open air in a climate controlled home, but their care requirements vary depending on their composition and condition.

Storage & Display

 

For most stone meteorites:

• Keep them dry. Store specimens in a climate-controlled environment, away from excessive humidity.
• Use protective containers. Sealed gem jars and specimen cases help protect against moisture, dust, and accidental damage.
• Consider silica gel. Desiccant absorbs moisture inside sealed containers, providing additional protection for specimens containing metallic iron.
• Avoid temperature extremes. Rapid temperature changes can cause condensation, while excessive heat may damage certain specimens.
• Protect fragile surfaces. Fusion crusts, weathered surfaces, and delicate slices should be handled carefully.

 

Our DryCell Desiccant Cases provide a convenient way to help manage moisture around specimens.

 

Handling & Cleaning

 

Stone meteorites are generally durable, but improper handling can damage sensitive surfaces.

• Handle specimens with clean, dry hands or gloves.
• Use nitrile gloves for fragile, polished, or scientifically valuable specimens.
• Avoid unnecessary contact with fusion crusts and delicate surfaces.
• Remove loose dust with a soft, dry brush.
• Never wash meteorites with water as part of routine cleaning.
• Avoid household cleaners, oils, waxes, and chemical treatments unless specifically recommended.

 

Water can penetrate fractures and promote corrosion, even when a specimen appears dry afterward.

 

Caring for Iron Meteorites

 

Iron meteorites consist primarily of iron and nickel. Many originate from the metallic cores of ancient asteroids. Their internal crystalline structures can sometimes be revealed through polishing and acid etching, producing the beautiful geometric Widmanstätten patterns prized by collectors.

 

However, iron meteorites require particular attention because they are susceptible to rust.

Why Do Iron Meteorites Rust?

 

When exposed to moisture and oxygen, metallic iron oxidizes and forms rust.

 

Some iron meteorites contain chloride-bearing compounds that contribute to persistent corrosion. Consequently, certain specimens are naturally more susceptible to rust than others.

 

Signs of corrosion include:

• Orange, yellow, or reddish-brown spots.
• Discoloration around cracks and inclusions.
• Powdery or flaky material developing on the surface.
• New staining beneath protective coatings.

 

Not every brown area indicates active corrosion. Some iron meteorites have a stable natural patina that should be preserved.

Storage & Humidity Control

 

Controlling humidity is the most important step in preserving an iron meteorite.

• Keep humidity low. Relative humidity below 40% is a useful general target, although corrosion-prone specimens may require drier conditions.
• Use sealed containers. Airtight display cases help isolate specimens from environmental moisture, particularly in humid or salt-air environments.
• Include silica gel desiccant. Desiccant absorbs moisture and helps maintain a dry environment.
• Monitor your desiccant. Replace or recharge it when saturated.
• Avoid damp environments. Bathrooms, garages, basements, and coastal environments can accelerate corrosion.
• Prevent condensation. Avoid rapid temperature changes that cause moisture to accumulate on metal surfaces.

 

Our DryCell Desiccant Cases are designed to help collectors manage moisture in their meteorite displays.

 

For particularly valuable or corrosion-prone specimens, sealed storage with fresh desiccant is generally preferable to open-air display.

 

Handling & Cleaning

 

Iron meteorites are especially sensitive to moisture and salts transferred through handling.

• Wear clean nitrile or cotton gloves.
• Handle etched slices by their edges.
• Avoid touching polished metal surfaces directly.
• Never wash with water.
• Remove loose dust with a soft, dry brush.
• Avoid abrasive cleaning products and polishing compounds.

 

We generally use CLR or Rust Kutter for removing rust on iron meteorites.

 

Etched surfaces require additional care because scratching or aggressive cleaning can permanently damage their crystalline patterns.

 

Protective Coatings

 

Many iron meteorites are treated with protective coatings to reduce exposure to moisture and oxygen.

 

Common treatments include:

• Microcrystalline wax: Products such as Renaissance Wax provide a thin protective barrier.
• Light mineral oil: Sometimes used on suitable uncoated specimens to reduce moisture exposure.
• Clear protective coatings: Specialized lacquers and conservation-grade acrylic resins provide additional protection.

 

No coating guarantees permanent protection against rust.

 

Before applying any treatment, determine whether your meteorite already has a protective finish. Additional coatings may be unnecessary or incompatible with existing treatments.

 

Inspect Your Iron Meteorite Regularly

 

We recommend inspecting iron meteorites approximately once a month.

 

Pay particular attention to:

• Edges of cut or polished slices.
• Cracks and fractures.
• Areas surrounding mineral inclusions.
• Etched surfaces.
• Previously treated areas.

 

Look for new discoloration, powdery deposits, or other changes.

 

Taking occasional photographs can help document your specimen’s condition over time.

 

Frequently Asked Questions

 

Can I Touch My Meteorite with Bare Hands?

Yes, most meteorites can be handled briefly without gloves. However, repeated contact can transfer moisture, oils, and salts. Gloves are recommended for polished iron meteorites, etched slices, and fragile specimens.

 

Can I Wash My Meteorite with Water?

We strongly recommend against washing meteorites with water as part of routine maintenance. Water can penetrate fractures, promote oxidation, and damage sensitive materials.

 

Do All Meteorites Rust?

No. Rust primarily affects meteorites containing metallic iron. Iron meteorites are particularly vulnerable, while many ordinary chondrites can also develop corrosion around their metal grains.

 

Should I Oil My Iron Meteorite?

Not necessarily. Some iron meteorites benefit from protective oil or wax, while others already have coatings that should not be disturbed. Consult your dealer before applying any treatment.

 

How Often Should I Replace Silica Gel?

It depends on the container, surrounding humidity, and amount of desiccant. Indicating silica gel changes color as it absorbs moisture, making it easier to determine when replacement or recharging is necessary.

 

Can I Display My Meteorite Without a Case?

Yes! Many stable meteorites can be displayed openly in dry, climate-controlled environments. However, sealed cases with desiccant provide additional protection for iron meteorites, pallasites, and specimens prone to corrosion.

 

Questions About Your Meteorite?

 

Every meteorite is unique. Its composition, history, and preparation can influence how it should be maintained.

 

At Midnight Meteorites, we want you to enjoy your specimen for generations. Whether you’re wondering about proper storage, protective coatings, or a suspicious rust spot, we’re happy to help.

 

Have a question about caring for your meteorite? Contact us!