Geometric features visible to the naked eye do not occur in meteorites

All of the photos below were sent to me by persons asking if the rock was a meteorite. All of them contain features, usually mineral crystals, with geometric shapes. Such features occur in some meteorites, but only at microscopic scales. If you can see such a feature with your unaided eye, the rock is not a meteorite.

The exception, of course, is circular chondrules in chondrites.