Most meteorites are attracted by the magnet, but the particularity of meteorites compared to terrestrial rocks is that they have 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.
As meteorites pass through the Earth’s atmosphere, air turbulence can create thumbprint-like depressions on the surface of meteorites 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.