Animal Limb Bones Glass Vial Necklace £4.99 £4.99 Add To Basket 1 in stock. This is a a test tube style glass vial necklace, filled with tiny animal limb bones, most likely from mice. I've found the bones in owl pellets which were carefully dissected. The bones are cleaned and whitened. The silver toned necklace is 17" long, the vial with cap is 3cm in length. Note that the vials and the cap are sealed.