Hello BCUSA! I'm in the process of making several primitive Hoko Knives . A hoko knife is a small knife used for processing fish. It is named after a site on the Hoko River where they found a well preserved native village https://en.wikipedia.org/wiki/Hoko_River_Archeological_Site . I have made a few of these in the past in the field but I always made the blades with inferior random stones I found in the creek. I just bashed rocks until I found ones that made good flakes and used those as blades, not needing to conserve materials or care if I was slightly wasteful. I have obtained a decent size chunk of obsidian (at least I think it is?) that I want to use to make blades but I'm not sure how I should go about chipping the blades off. Should I just break off a smaller chunk and smash it with a small rock until I get suitable pieces? Should I try and chip them from the large chunk? Is there a specific knapping technique that would be best suited to getting small flakes? Here's the stone in question Holding it for scale I want to make good use of this obsidian and waste as little as I can. I'm still a newbie when it comes to knapping but I am always striving to learn more . The work I have done with stone so far has been a little on the crude side to say the least. Any advice would be greatly appreciated! Handles I plan on using. Willow shoots that I processed and smoothed out with stone tools! They have been drying in my room for some time and retained their bright white color nicely. I'm going to use either roots or some natural cordage to bind it all with.