A few years ago I harvested some stones from a creek-bed while out dirt biking, thinking I would engrave on them. Turns out they didn’t laser well at all, and I put them aside.
About six months ago I found them, sprayed them matte black with some krylon, and put them aside to dry.
Yesterday I found them again.
Finally, while walking the dog last night, I carefully placed them in select locations around my neighborhood. Multi-year project complete!