Extended Data Fig. 8: Control results from natural auriferous quartz experiments.
From: Gold nugget formation from earthquake-induced piezoelectricity in quartz
Imagery of the natural gold-bearing quartz control slabs from our growth experiments. Samples were submerged in their respective solutions, but not deformed. (a) BSE image of natural auriferous quartz gold chloride (AuCl4) experiment. Gold grain within quartz. (b) and (c) are BSE and SE images, respectively, of the square area outlined in (a). (d) BSE image of natural auriferous quartz gold nanoparticle (AuNP) experiment. Gold grain within quartz. (e) and (f) are BSE and SE images, respectively, of the square area outlined in (d). In both samples, particles seen on the gold grain surface are pieces of quartz. BSE: Backscattered electron. SE: Secondary electron.
