How much is rock crystal quartz worth?
Your hypothesis is possibly suited, yet no longer testable as even susceptible explosions produce some EMP, so the EMP from the quartz (or different piezo electric powered fabric) may be hidden by the improved EMP from the implosion. Neil
Because of the high impedance of typical piezoelectric devices, voltage is usually a more meaningful parameter than current. Moreover, without specifying respective quantities of quartz and rochelle salt, your question is a bit like asking, which produces a larger painting, water color paint or oil-based paint? Quartz is much more chemically and mechanically stable than rochelle salt, so long-term reliability (and, hence, ultimately more voltage, current, etc. over the long term) is typically obtained from quartz piezoelectric devices.
