Well I bought a kit and thought what the heck I live in Oregon, theres tons of obsidian so I may as well try it out. I know its rough but here is my first.
Obsidian is a good way to start. Easy chipping. I hope you have plenty of band aids. Obsidian cuts are so clean at least they heal quickly. This mahogany is the last obsidian that I worked. I made this 20 yrs ago. No more for me!