Aside from quartz, another substances that exhibit the piezoelectric outcome are Rochelle salt and tourmaline. Rochelle salt reveals the greatest piezoelectric effect, but its purposes are restricted to manufacture of microphones, headsets and loudspeakers. It's because the Rochelle salt is mechanically the weakest and strongly afflicted by dampness and heat. https://consumerelectronicscrysta14826.humor-blog.com/33846835/everything-about-timing-components-for-consumer-electronics