I'm in southern Oregon. Today while panning/ looking for gold I dug up a 3"x5" piece of obsidian out of a hole approximately 3 feet deep not far from the waters edge. I don't know much about native artifacts or obsidian. It appears to be worked, and we do not have obsidian in our area. The closest would be 100+ miles away and wouldn't be in our drainage, so it couldn't have washed down. If anyone can take a look at the pics I'd love an opinion. Thanks.