The Origin of Mirror Technology

If you break a mi that's supposed to be seven years of bad luck. But why? How did this come about? What is the origin of this superstition? Well, my first question was, how did people make a mirror back in ancient times? I mean, the production of glass, i think, is relatively new, so i just assume they were looking at themselves in water. Early mirrors were made of polished stones, often very shiny volcanic glass. Some mirrors were made out of copper. It was the syrians who invented the blowpipe in the first century b c e. We've all seen blown glass, right? And so they would back these mirrors with lead, or