The flat piece looks like Blueschist maybe. Might be referred to as California Slate sometimes, but the schists were used for a lot of things including pendants and the material isn’t always blue. It can be greyish to almost black. If it’s found at a site where it’s not occurring naturally then, obviously it was brought there by the Wappo or Coast Miwok as the case may be. The translucent obsidian point/blade is very fine and I really like the odd shaped point one that just seems to be missing the base or it’s a flat base by design. The glossy black one also very cool, maybe one of those fatter cascade’s.