Received after more than two months is a long time. The stone is intact, no scratches or blows. It weighs 17.70 grams.
The stone is as described but I do not believe it is authentic obsidian. This stone is very light, obsidian is heavy. Obsidian is volcanic glass and has a shine to it. This stone is dull and light. If you just need a black stone, then it’s fine. If you want obsidian, I don’t think it’s real.