Check Out 25 Cool Collar Bone Tattoos. Creative collar bone tattoos will make you look unique and different from others. Symbols of bird, feather, flower, butterfly, star and attractive font style are used in these collar bone tattoos.
Chemical structure for Seratonin, which is a naturally occurring chemical in the brain that makes us feel happy and rewarded. So the tattoo is a daily reminder that I can be happy without meds. nerd science tattoo for the win.