... and a dobby stone, which was supposed to be lucky, because it had a hole in it. (She'd been told that when she was seven, and had picked it up. She couldn't quite see how the hole made it lucky, but since it had spent a lot of time in her pocket, and then safe and sound in a box, it was probably more fortunate than most other stones, which got kicked around and run over by carts and so on.)

(Terry Pratchett, "A Hat full of Sky", 2004)