Hey man, the two on the left are both obsidian for sure. I think the ring finger is quartz and not sure about the other. It’s definitely an opaque material. I haven’t seen any of this material naturally around here, I am pretty sure it came from a mountain range about 20 miles to the North where the is an abundance of obsidian and other igneous rocks.Is that obsidian on the pointer finger, chert on the middle and quartzite on the other two? Nice variety in your yard!