Gold was supposedly used in the capstones of the pyramids. Gold was always associated with the pyramids but of course greed set in and that was stolen over time, and in the incas, the Spaniards took large gold discs made by the Inca tribes possibly from the pyramids there… interesting anyway. maybe it has a resonance or vibration that is necessary for the pyramids?
because this: frequencies… maybe relevant maybe not. but this person highlighted the interesting theory. not me. I am just adding to it.