Crowhop maybe the obsidion won't give ya sparks but it will do well as a micro knife. Knap off a samll flake n try useing it on a piece of meat or the like,ie, skinning, filetting etc, it is exceptionaly sharp stuff. Only thing bad is it is so darn fragile. Just some thoughts YMHS Birdman
Obsidian's too soft (hardness of 5 on Moh's scale) to reliably shave any steel off of the frizzen. Flint is harder at about 7 and that's why it works much better. However, I do like obsidian for knapping points and tools as it's softness and structure gives a nice conchoidal fracture when flaking.