Piezo ignition ...when a button is pressed, hits a crystal of PZT or quartz crystal. Quartz is piezoelectric, which means that it creates a voltage when deformed. This sudden forceful deformation produces a high voltage and subsequent electrical discharge,...
Thank you, Russ.
I was actually trying to ask whether this was piezo or flint-and-steel not how piezo works, but cool to have an explanation posted.
HJ