No gem and mineral show near me so I need help. The closest rock club is two hours south.
I go beach combing a couple times a week if the weather and tides are good. I look and find agates, sea glass, seal bones and driftwood. But I also find things I can not identify like the rock in my photo. I found it on the beach. It looks like obsidian with clear and green inclusions. It is as big as a goose egg. Everything looks like glass slag but I do not know of any glass factory north of me. (I am 20 miles south of Oregon) I would think if is was slag more pieces would also be seen, even very tiny.
Any ideas?