I don’t know how gold but oil and gas are extracted well with this method, it’s possible to change the approach and use other elements in hydraulic fracturing so that they do not dissolve gold, I think this would really be a breakthrough in gold and the metal industry where you can make high-quality metal by testing it with using spectrometers here is an example from a commercial website (in violation of rule 2.7) that analyzes the quality of metal showing the amount of chemical elements in it.