It seems absurd to me that bone arrows are better than stone arrows. I should *some* mountains should produce obsidian from digging rather than stone. I would think that obsidian should have quality of like gold and silver and the crafting of it is dependent upon stats and skills. Personally I would make it sqrt(dex*psy) but it's rather absurd how difficult psy is to attain that wouldn't exactly make it a replacement for lowbie tools so I don't think that's appropriate game mechanics. Perhaps someone might suggest a more practical if less realistic formula. Anyone who has psy has access to decent metals (to cook the bulbs) and i think metal should be better than obsidian.
It could also be used to craft cutting tools that are independent of tree Q. unfortunately this brings me back to Obsidian>Metal which seems just as absurd as bone>stone to me. I'm quite frustrated trying to think of a way to incorporate obsidian in a way that makes it better than bone but less than metal. Maybe someone can help me out here or something will dawn on me sooner or later. It just seems to me that obsidian should be part and parcel to the survival of this era.