Hello being a Expert on obsidian there sure don't know much. I was very disapoiunted in the rainbow obsidian show. The color she showed the the camera was hit so that a secondary flake had air under it to show color. There are in fact over 250 different colors of obsidian or conbinations of colors so if you want a really good show on obsidian contact me and set the time for summer Glass Buttes Oregon it's blm land and was set aside for rockhounding in 1969 by a act of congress. please try to do a little research on you subject before tapping thanks