Crystal Agate &reg;Black Obsidian Prism Style 6-sided Natural Double Terminated Point Wand Large 3 Inch Black Obsidian Prism Style 6-sided Natural Double Terminated Point Wand Large 3 Inch Black Obsidian Rock Crystal Massage Wand Suitable for office, collecting, gifts, study, jewelry, massage, healing About 3" , double terminated points, large Black Obsidian ; Obsidian is natural volcanic glass