Answer: toadstone

AnswerCrossword Clue
TOADSTONEObject once worn as a charm.
TOADSTONEKind of charm
toadstoneA gem, fossil tooth, or other stone formerly supposed to have been formed in the body of a toad, and credited with therapeutic or protective properties
toadstoneany stone or stonelike concretion believed to be formed in a toad and to have magic powers