What about all the lava flows, tunnels, caves and such? Surely there should be some glass chunks there somewhere? Manny how about it? No Obsidian in the Hawaiian island chain? Oh well, I guess I guess Jesse will have to tote some rock with him.
Not good luck to take rock from volcanoes anyway. The Hawaiian park service office is flooded with boxes of rock, and such, from people who have taken "souvenir" pieces of rock, asking them to take it back to the volcano, because of all the bad luck they are having.
Wayne