This is some stuff I've been working on lately. I've got a little keokuck, Jeff city, my cooked brown CO chert (i think it's burlington), obsidian and some Texas rock. By far the brown CO works the best and makes the best blades. The texas rock is the brown hunting point on the right side of my hand. Kinda thinkin it needs some heat. Can anyone identify it and confirm that?!? Also will it cook about the same as my local chert?