Most meteorites are attracted by magnets. The characteristic of the meteorites contrary to Earth rocks, is that they a fusion crust.
The fusion crust has been created on the surface of meteorites by crossing the Earth’s atmosphere.
This crust is like a very thin weak black film that can disappear because of erosion.
When meteorites crossed Earth’s atmosphere, the air turbulences can create on the surface of meteorites depressions like thumbprints called regmaglypts.
These regmaglypts don’t exist on Earth rocks.
By cutting a stone meteorite, you’ll see in most cases small metal grains and the presence of chondrules (small balls of approximately 1 mm) in the chondrites.
Iron meteorites can be identified through figures Widmanstätten revealed by acid on their polished surface.
Another solution to make sure that a stone is extraterrestrial is to test it with nickel. The meteorite metal always contains nickel. The Earth rocks don’t’. Dimethylglyoxime is used to highlight nickel in a sample.