High in the remote Altai Mountains of northwestern China lies one of the most remarkable meteorite discoveries on Earth — the Aletai Meteorite. Massive iron fragments scattered across rugged mountain terrain tell the story of an ancient cosmic visitor that survived a violent journey through Earth’s atmosphere thousands of years ago.

For meteorite collectors and space enthusiasts alike, Aletai is extraordinary. Its immense size, beautiful crystalline structure, and mysterious history make it one of the most fascinating iron meteorites ever discovered.

Holding a piece of Aletai is holding part of a shattered asteroid core that formed during the birth of the Solar System more than 4.5 billion years ago.

Quick Facts

Meteorite Name: Aletai Meteorite

Meteorite Type: Iron Meteorite

Classification: Coarse Octahedrite, IIIE Iron Meteorite

Location: Altay Prefecture, Xinjiang, China

Discovery: Known locally for centuries, scientifically recognised in 1898

Estimated Fall Date: Likely thousands of years ago

Estimated Age: Approximately 4.5 billion years old

Composition:

• Iron: Approximately 91%

• Nickel: Approximately 8%

• Trace elements including cobalt, gallium, germanium, and iridium

Largest Known Mass: More than 28 tonnes

Famous Specimen: The “Silver Camel”

Above: The Aletai meteorite strewn field lies within the Altai region of Xinjiang in northwestern China.

The Meteorites of the Altai Mountains

The Aletai Meteorite strewn field stretches across the Altai Mountains of northwestern China near the borders of Mongolia, Russia, and Kazakhstan. This rugged and isolated region is famous for its dramatic landscapes, icy winters, and ancient trade routes.

Unlike a single impact crater event, Aletai consists of numerous iron meteorite fragments scattered across a large area. Scientists believe the original meteoroid fragmented during atmospheric entry, raining massive iron pieces across the mountains.

The strewn field extends for nearly 430 kilometres, making it one of the longest known meteorite strewn fields on Earth.

Above: A meteorite strewn field forms when a meteoroid breaks apart in Earth’s atmosphere.

A Discovery Known for Centuries

Long before scientists studied the meteorite, local people in the Altai region already knew of strange iron masses lying among the mountains.

Historical records suggest some fragments may have been known for hundreds of years. One of the most famous masses, later named the “Silver Camel,” was reportedly discovered by local herders and traders travelling through the region.

In 1898, scientists formally identified the material as meteoritic iron, beginning one of China’s most important meteorite studies.

The meteorite became even more famous in 2005 when researchers officially recognised the widespread strewn field and linked numerous fragments to the same cosmic event.

The Famous Silver Camel

Among all Aletai specimens, none is more famous than the “Silver Camel.”

This enormous iron meteorite mass weighs approximately 28 tonnes and is one of the largest meteorites ever discovered in Asia. Its name comes from its unusual shape, which some believe resembles a kneeling camel.

Today, the Silver Camel is regarded as one of China’s most important meteorite treasures.

Above: The famous “Silver Camel” is one of the largest iron meteorites ever discovered in Asia.

A Visitor Older Than Earth

Although Aletai reached Earth relatively recently in geological terms, the meteorite itself formed during the earliest days of the Solar System.

Scientists estimate that the iron and nickel within Aletai crystallised approximately 4.5 billion years ago inside the molten metallic core of an ancient asteroid.

Over time, collisions shattered this parent asteroid into smaller fragments. One of those fragments eventually entered Earth’s atmosphere and became the Aletai Meteorite.

In many ways, iron meteorites like Aletai are fragments of destroyed miniature worlds that no longer exist.

Classification and Composition

Aletai belongs to the rare group of iron meteorites, which make up only around 5% of meteorites recovered on Earth.

More specifically, it is classified as a coarse octahedrite within the rare IIIE chemical group.

Its composition includes:

• Approximately 91% iron

• Approximately 8% nickel

• Small amounts of cobalt

• Trace gallium

• Germanium

• Iridium

The relatively high nickel content helps stabilise the metal and contributes to the formation of beautiful internal crystal structures.

Researchers have also identified inclusions of troilite and schreibersite within some Aletai specimens, offering important clues about asteroid formation and cooling processes.

Above: A polished Aletai meteorite slice reveals its metallic internal structure.

The Widmanstätten Pattern: Geometry From Deep Space

One of the most fascinating aspects of Aletai appears when the meteorite is cut, polished, and etched with acid.

The process reveals an intricate geometric crystal structure known as the Widmanstätten pattern.

These interlocking metallic bands formed as the asteroid’s molten iron core cooled extraordinarily slowly over millions of years in space. Cooling rates were so gradual that the crystal structure could grow atom by atom.

These patterns cannot form naturally on Earth because our planet cools far too quickly.

Each etched slice of Aletai displays a unique extraterrestrial fingerprint created billions of years ago deep inside an asteroid.

Above: The Widmanstätten pattern forms from extremely slow cooling inside an asteroid core.

One of Earth’s Longest Strewn Fields

One of the most scientifically important aspects of Aletai is the enormous size of its strewn field.

Researchers estimate the debris field stretches approximately 430 kilometres across the Altai region. This extraordinary distance suggests the original meteoroid fragmented high in Earth’s atmosphere while travelling at tremendous speed.

The large distribution area has helped scientists better understand how massive iron meteoroids behave during atmospheric entry and fragmentation.

Aletai remains one of the best examples of a giant iron meteorite breakup event.

Why Collectors Love Aletai

Aletai meteorites are highly prized among collectors for several reasons.

Stunning Appearance

Etched slices display bold Widmanstätten patterns with excellent contrast.

Historic Importance

Aletai is one of China’s most famous meteorites and among the largest known iron meteorite strewn fields.

Excellent Stability

Compared to some iron meteorites, many Aletai specimens show relatively good long-term stability when properly cared for.

Connection to Deep Space

Each specimen formed within the core of an ancient asteroid billions of years ago.

Whether displayed as a polished slice, jewellery piece, or natural sculpted fragment, Aletai offers collectors a genuine connection to cosmic history.

Above: Iron meteorites like Aletai are highly sought-after by collectors worldwide.

Fun Facts

• Aletai’s strewn field stretches roughly 430 kilometres.

• The Silver Camel meteorite weighs approximately 28 tonnes.

• Aletai belongs to the rare IIIE iron meteorite group.

• The meteorite material formed approximately 4.5 billion years ago.

• Iron meteorites represent only around 5% of recovered meteorites.

• Widmanstätten patterns can only form through extremely slow cooling in space.

Caring for Aletai Meteorites

Because Aletai is primarily composed of iron, it should be stored carefully to prevent rust.

To preserve your specimen:

• Store in a dry environment

• Avoid prolonged humidity exposure

• Use silica gel packs in display cases

• Handle polished pieces carefully

• Keep etched slices away from moisture

Proper care can help preserve the meteorite for generations.

A Fragment of an Ancient World

Above: Iron meteorites are fragments of ancient asteroid cores formed during the birth of the Solar System.

Few objects on Earth connect us to the ancient cosmos as directly as meteorites.

The Aletai Meteorite is not merely a rare collectible or unusual rock. It is a survivor from the violent formation of the Solar System — a fragment of an asteroid core that travelled through deep space for billions of years before finally reaching Earth.

When you hold a piece of Aletai, you are touching material older than our planet itself — a silent witness to the birth of worlds.