Hey, Got two knives here that i am going to give away or trade for something. One is obsidian and the other, well, your guess is as good as mine. Found the rock on the west coast of Oregon. It was either there or Washington. Wherever Kincheloe bay is. I think it is in Oregon. Went through some training there years ago and don't really remember exactly. The mystery rock is much harder than the obsidian. Actually reminds me of some stone i found in Missouri. Tough stuff. Any ideas on what rock it may be are appreciated.