Now, I know flint is already a thing but I think it needs some more purpose.
First of all, imagine this scenario. Your in the wild and your being hunted by some players on a server, and you can't get any tools and the ones you brought are broken. Then you see some gravel and mine it up. You get some sticks from the nearby tree and craft a flint dagger. And they arrive. And you kill them all. You were saved by a humble piece of flint. And that is what flint would be useful for. And same would be for obsidian. These are not really good tools but they do the job. The flint's base damage, while better than wood, is not as good as stone. It will be 4.5. The obsidian is much better, coming in at 6. There are every tool and weapon that the other alloys have, but these have a more primitive look. The textures will be posted later. The good thing about these will be they are much cheaper but just as good quality as, if not better than, standard wood tools. None of these will have armour.