Well, the Earth is always being hit by bits of stuff. Usually tiny rocks, almost just specks of sand are what you see when you see a meteor. They are going so fast that they heat up from the air hitting them and burn up. No, just tiny bits of rock. As strange as it seems we know that most meteors are precisely that - small bits of low mass material.
Most meteors never survive their fiery entries into the atmosphere.
Ones that do are called meteorites . These are mineral deposits formed by rapid cooling - likely from the earliest stages of the solar system when solids were condensing out. We take it for granted that meteors and meteorites are astronomical phenomena. During the 17th and 18th centuries, however, reports of rocks falling from the sky were greeted with skepticism. These occur anywhere in the sky.