Apart from quartz, the other substances that show the piezoelectric influence are Rochelle salt and tourmaline. Rochelle salt reveals the greatest piezoelectric outcome, but its apps are limited to manufacture of microphones, headsets and loudspeakers. It is as the Rochelle salt is mechanically the weakest and strongly influenced by moisture https://crystal-oscillator26037.blogdigy.com/5-simple-techniques-for-consumer-electronics-crystal-oscillators-52637723