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Toluca

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description Toluca Overview

Toluca is an IAB-group iron meteorite found in the Toluca Valley of central Mexico and known locally for centuries. Numerous masses and fragments have been recovered, allowing material from the meteorite to become widely represented in museums, teaching collections, and private collections. Its iron-nickel metal can display Widmanstätten structure after suitable cutting, polishing, and etching, and its inclusions help researchers investigate the complex formation history of IAB meteorites.

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Where was the Toluca meteorite found?

The Toluca meteorite was discovered in the Toluca Valley in the State of Mexico, central Mexico. It was known to local communities for centuries, with many masses originally used by indigenous people as a source of iron for tools before its extraterrestrial origin was recognized.

What type of meteorite is Toluca classified as?

Toluca is classified as an IAB-group iron meteorite, a class known for its coarse octahedrite structure and occasional silicate inclusions. When etched, Toluca specimens display the distinctive Widmanstätten patterns characteristic of iron meteorites.

Are Toluca meteorite specimens common in museum collections?

Yes, because numerous masses of the Toluca meteorite have been recovered over the years, it is one of the most widely represented iron meteorites in museums, universities, and private collections worldwide. Its abundance makes it an accessible and popular specimen for collectors and educators alike.

What does the interior of the Toluca meteorite look like when cut and polished?

When cut, polished, and lightly etched with acid, Toluca specimens reveal the Widmanstätten pattern — interlocking bands of kamacite and taenite that formed over millions of years of slow cooling inside an asteroid. Some Toluca specimens also contain angular silicate inclusions within the iron matrix.

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