RE: GreyCloud GlassBrain. FWIW, & I'm no expert, but I believe a 43-101 is the term used for the official report for a certified deposit. This can be attained after an appropriate drill program has been conducted, the cores split & sent for separate assays. From there a "Bankable Feasibility Study" can be conducted, which can move the project from the possibilities to the probabilities. There is probably some sorta "minimum standards & bonding" in there too.
I would imagine all steps could bring volatility to the project.
Just my 2¢ worth, Regards, Nelson.