Pure quartz, or “rock crystal” from Brazil ... with quartz being one of the main crystals they focused on. Piezoelectricity first proved its utility in World War I, with submarine warfare ...

Thus, piezoelectricity may be a universal property of living tissue, and may play a significant part in several physiological phenomena ...

The researchers noted that pure gold is often found in or near ... The full paper "Gold nugget formation from earthquake-induced piezoelectricity in quartz" was published in the journal Nature ...