Originally Posted by
_Khasim_
The artifacts you get to solve are random but based on your skill. Since not many people maxed out archaeology as of today, there's really little information on that other than you propably need Illustrious skill level to get the 85 BoAs. Other than that, you'll have to just blindly farm archaeology yourself and hope you get it.
And the "stones" AFAIK are only there to reduce the fragments you need for an artifact, and they aren't in all of the artifacts. I had to gather straight 85 fragments for my Fossilized Hatchling.