Skulls are one of the most ancient symbols known to man. To some modern cultures, it is a reminder of death and mortality; to some ancient societies, it is said that the skull represents life and humanity. Obsidian is quickly cooled volcanic lava. It is a natural glass. A stone of protection with grounding properties, it reduces fantasies and helps clear subconcious blocks. Absorbs and disperses negativity. Powerful healer for those attuned to it.