Meteorites do not have flat parts. I have been sent photos of meteorwrongs with four kinds of flatness.
- Layered sedimentary rocks that are flat on two sides. Meteorites are not layered.
- Some igneous rocks fracture along planes leaving a flat surface or two parallel flat sides.
- Man-made things that were sawn or forged with a flat side
- Man-made things that started out molten and then solidified in a confined space so that the top is flat or was poured onto a concrete or other hard floor so the bottom is flat.