abstract:The toadstone (like the batrachite), also known as bufonite, is a mythical stone or gem thought to be found in, or produced by, a toad, and is supposed to be an antidote to poison. Artifacts called "toadstones" were actually the fossilized teeth of Lepidotes, an extinct genus of ray-finned fish from the Jurassic and Cretaceous periods, as they appeared to be "stones that are perfect in form".