When Bear left early the next morning, Hawk Chief said, "I ought to give you some obsidian as a present for your uncle, Turtle Old Man, but I haven't any left. But go by the village of the Flint people. They live right at the foot of Black Glass Mountain. That mountain is made entirely of black obsidian, and some of it is just right for knives and arrowheads. But the Flint people have the sole rights to it. You can get it only through them. They are a crusty people, quick to anger, but it's only the surface. They really are good people if you don't get offended at first. Here is some venison; give it to them as a present from me."

-- From Indian Tales by Jaime de Angulo