Allende is a Type III (CV3) carbonaceous chondrite that fell in Allende, Mexico on February 8, 1969. This meteorite formed during the solar nebula phase of our solar system 4.56 billion years ago and contains interstellar grains (remnants of a prior star that lived out its life and exploded before the formation of our Sun) within calcium/aluminum-rich inclusions (CAIs). Allende represents some of the oldest known matter.

To date, over two tonnes (2,000 kilograms) have been recovered, more than 80% of the total known carbonaceous chondrite material. Allende is the C-chondrite most commonly found in collections.

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