Meteors are believed to be broken off pieces of comets. They are often metaliic and are made of igneous rock and minerals.
It depends on the type of meteor. Most meteors (around 86%) are made from silicate minerals and are known as chondrites for the small, spherical particles called chondrules which they contain. Achondrites (so named because they do not have chondrules) make up 8% of all meteors, do not have chondrules, and are sometimes similar to igneous rocks. 5% of all meteors are iron meteors, which are made of iron and iron-nickel alloys. And the last 1% of all meteors are stony-iron meteors, which contain iron-nickel alloys and silicate minerals.
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