From spds post"But if you drive around Victoria and look at the...

From spds post
"But if you drive around Victoria and look at the piles of tailings left behind from decades of mining and refining, one would think that this advanced technology could indeed wring out enough AU to make the venture profitable"

Well one gram a ton tailings has around $35 of Au if 100% extracted so that seems a better venture than selling rock for $5 a ton, if the technology works.
many of these small gold and cassiterite companies say they have some special extraction technologies some end up working to become a new gecco type system most go to oblivion.