Crystal Agate &reg;Black Obsidian Round Ends Gemstone Specimen Wands. Massage, Reiki, Chakra, Heal. Black Obsidian Round Ends Gemstone Specimen Wands. Massage, Reiki, Chakra, Heal. Weight 	70 g Length 	3.6 inch Width 	0.9 inch Thickness 	0.7 inch