Oh look an SEM with a 2 micron beam to "prove" it is there and...

Oh look an SEM with a 2 micron beam to "prove" it is there and the weigh percentage is still only 13-18% Au with oxygen percentages (the most abundant element in the earths crust) excluded so that SEM could never report percentages of major oxides. They should have been able to focus that 2 micron beam on one of the "visible" metal alloy particles and get near on a 100% percentage weight of precious metals. So which is it? Sub- micron precious metals locked up in some strange "relativistic ionic state" or visible metal particles?

Are you suggesting 0.2 micron or even 0.1 micron gold particles and if so - what grind size, throughput and energy consumption do you expect to have to use to liberate those gold particles?